Bitcoin

At 13:19:55 (UTC) on August 18, 2008, the bitcoin.org domain was registered. The domain later became an important gateway to the white paper, software downloads, and educational materials, but ownership of the domain does not equal control over the Bitcoin protocol or network; Bitcoin’s valid rules are still verified independently by the nodes participating in the network. The registration record can only prove that the domain existed at that point in time, and cannot by itself prove the real-world identity of the registrant.⁠[3]

On October 31, 2008, an author using the pseudonym “Satoshi NakamotoSatoshi NakamotoSatoshi Nakamoto is the pseudonymous creator of Bitcoin, who published the Bitcoin white paper in 2008, released the first Bitcoin software and launched the blockchain in 2009, and stopped public activity around 2011; the person’s true identity has never been confirmed.Open the full entry” posted “Bitcoin: A Peer-to-Peer Electronic Cash System” to a cryptography mailing list. The paper proposed a peer-to-peer payment scheme that does not rely on a trusted third party: transactions are authorized by digital signatures, and nodes bundle transactions into blocks and form a chronologically linked history through proof of work; recipients gain confirmations through subsequent blocks, reducing the probability that a transaction will be replaced by another chain with more accumulated work. The paper also noted that the history of public keys is public, so Bitcoin is more accurately described as pseudonymous rather than inherently fully anonymous.⁠[4]

On January 3, 2009, Bitcoin’s genesis block (height 0) was written into the mainnet parameters, with the initial block subsidy set at 50 BTC. Its coinbase input embeds that day’s front-page headline from The Times: “The Times 03/Jan/2009 Chancellor on brink of second bailout for banks.” This headline provides a time anchor showing the genesis block could not predate the news, and also directly records the financial-crisis backdrop of bank bailouts at the time; the block data itself cannot further prove all of the author’s motives for choosing it. The genesis block is defined directly by the software, and its coinbase output is subject to special historical conditions and cannot be spent like an ordinary mining output.⁠[5]

On January 8, 2009, Satoshi Nakamoto announced the first public release of Bitcoin v0.1. Nodes form a peer-to-peer network over port 8333; senders broadcast signed transactions, full nodes verify transactions and blocks, and miners build a coinbase, a Merkle root, and an 80-byte block header from candidate transactions, then repeatedly change the nonce, the time, or the coinbase extra nonce in search of a double SHA-256 hash whose value is no higher than the target threshold. After a valid block is broadcast, it must still be verified by other nodes according to the consensus rules. The mainnet adjusts the target every 2016 blocks based on the actual time taken, with a long-run target of about one block every 10 minutes on average. Solo miners receive the entire subsidy and fees but face high income variance; mining pools distribute earnings according to submitted shares, but this does not change the requirement that the final block must meet the network-wide target.⁠[6][7][8]

Block 170 was recorded at 03:30:25 (UTC) on January 12, 2009; in addition to the coinbase transaction, it contained an ordinary transaction of 10 BTC sent from Satoshi Nakamoto to Hal Finney, one of the earliest on-chain peer-to-peer transfer records. Ordinary transactions do not modify an “account balance table”; instead, they reference and spend earlier UTXOs and create new outputs, and the difference between total inputs and total outputs can serve as the transaction fee. The balance a wallet displays is essentially a sum of the UTXOs that its keys can unlock.⁠[9][10]

On May 18, 2010, forum user Laszlo Hanyecz offered 10,000 BTC for two pizzas, and confirmed on May 22 that the trade had been completed. This original forum record became a representative case of Bitcoin’s early move from an experimental token to exchange for physical goods. It shows that the protocol only verifies and settles Bitcoin transactions, while pricing of goods, fulfillment, and dispute resolution still take place off-chain; May 22 later came to be commonly known as “Bitcoin Pizza Day” as a result.⁠[11]

On August 15, 2010, the community discovered that an anomalous transaction in block 74638 exploited an integer overflow to create two outputs of about 92.2 billion BTC each. The problem arose because older code did not correctly check for overflow when summing multiple outputs; developers provided a patch within hours, nodes switched to a valid chain that did not include the anomalous transaction, and the erroneous issuance was not retained in the final history. The incident showed that “rules written in code” does not mean implementations cannot err, and that node upgrades, independent verification, and emergency coordination are also part of the system’s security. BTC’s daily reference price that day was about $0.07.⁠[12][13]

In January 2011, Ross Ulbricht created the darknet market Silk Road; the site concealed its network location through Tor and used Bitcoin as part of its on-site payment system. Justice Department materials state that the site operated until October 2013, served more than 100,000 buyers, and handled more than $200 million in transactions for illegal goods and services. Silk Road expanded Bitcoin’s early use and public profile, but also linked it for a long time with drug trafficking, money laundering, and law enforcement controversies; this was an application-level and legal event, not a service provided or endorsed by the Bitcoin protocol itself.⁠[14]

On September 19, 2011, BIP 1 was assigned its number, systematically defining the Bitcoin Improvement Proposal process. BIPs are used to document protocol features, application standards, informational material, or collaborative processes, but the inclusion of a BIP only indicates that it falls within the scope of the documentation; it does not mean that the community has accepted it, that software has implemented it, or that all nodes will adopt it. Bitcoin has no central operator able to upgrade the entire network unilaterally; rule changes ultimately depend on whether implementers, reviewers, node operators, and economic participants adopt compatible software.⁠[15]

On February 11, 2012, BIP 32 was assigned its number, proposing hierarchical deterministic wallets: a tree of keys is derived from a single root seed, addresses can be organized by purpose or account, and an extended public key can be shared without exposing the private keys used for spending. This structure reduced the need for frequent backups that traditional random-key wallets had, and also allows merchant servers to generate new receiving addresses without holding private keys. It did not eliminate key risk: if the root seed is leaked, the derived wallets may be compromised, and if the root seed and valid backups are permanently lost, control over the corresponding UTXOs may also be lost.⁠[16]

On April 1, 2012, the Pay-to-Script-Hash (P2SH) validation rules of BIP 16 took effect. A payer can pay to a 20-byte script hash, and the recipient reveals and satisfies the full redeem script when spending, shifting more of the responsibility for constructing complex conditions to the recipient. P2SH made it easier to encode complex spending conditions such as multisignature into shorter addresses, but an on-chain address does not equal a real-world identity, and wallets and services still need to correctly store scripts, keys, and backups.⁠[17]

On November 28, 2012, block height 210,000 triggered the first subsidy halving, reducing the per-block subsidy from 50 BTC to 25 BTC. The consensus rules treat every 210,000 blocks as one subsidy period and halve the subsidy that the coinbase is allowed to create; at an average block time of about 10 minutes, this happens roughly every four years. The block reward miners can claim consists of the subsidy plus the fees of the included transactions, and full nodes reject blocks that claim more subsidy than allowed. Because amounts are calculated in whole satoshis, successive halvings will eventually reach zero through rounding down, and the cap on total issuance is slightly below 21 million BTC. Halvings constrain only new supply and do not guarantee that market prices will move in any fixed direction. BTC’s daily reference price that day was about $12.⁠[18][19][13]

On March 11–12, 2013, a block produced by Bitcoin Core 0.8 hit the lock-count limit of the Berkeley DB used by older 0.7 nodes, and new and old nodes temporarily accepted different chains. Because the 0.8 chain had more hash power for a time, the fork did not resolve on its own; mining pools and service providers suspended some operations, and major miners then switched back to the chain compatible with the older version, allowing the network to reconverge. The incident did not create a lasting new asset, but it revealed that database behavior could unexpectedly become a consensus difference, and prompted the project to strengthen compatibility testing and upgrade coordination. BTC’s daily reference price that day was about $48.⁠[20][13]

On September 10, 2013, BIP 39 was assigned its number, defining a method that maps 128 to 256 bits of entropy plus checksum bits to a mnemonic phrase and then generates a deterministic wallet seed through PBKDF2-HMAC-SHA512. Mnemonic phrases improved usability for human transcription and offline backup, but they are not ordinary login passwords, and users should not make up their own sentences; anyone who obtains a valid mnemonic and the optional passphrase may be able to derive the keys. The standard also has limitations regarding word lists, checksums, and version identification, so backup media, recovery drills, and wallet compatibility all matter.⁠[21]

On October 1, 2013, U.S. law enforcement officers arrested Ross Ulbricht in San Francisco and seized equipment related to Silk Road; on October 25, the Justice Department announced that a cumulative total of about 173,991 BTC had been seized in the case, including bitcoin from the site’s server wallets and bitcoin later obtained from wallets on computers controlled by Ulbricht. The event showed that although Bitcoin transactions do not rely on a central settlement party, they can still be linked through public on-chain records to servers, devices, accounts, and real-world identities, and can be lawfully seized and forfeited.⁠[22]

In February 2014, Mt. GoxMt. GoxMt. Gox was an early bitcoin exchange based in Tokyo, Japan. Jed McCaleb turned it into a bitcoin trading site in 2010 and Mark Karpelès took it over in 2011, after which it became for a time the world’s largest bitcoin trading platform. In February 2014 it halted withdrawals and shut its website, saying about 850,000 bitcoins were missing, and it then went through a civil rehabilitation application, bankruptcy, and civil rehabilitation proceedings at the Tokyo District Court; the trustee has been repaying creditors in bitcoin and bitcoin cash since July 2024, and as of October 2026 the repayment deadline had been extended to October 31, 2027.Open the full entry, a centralized exchange that had handled a large volume of Bitcoin trading, suspended trading, shut down its website, and filed for bankruptcy. Later U.S. Justice Department charging documents state that its systems had been subject to unauthorized access since 2011 and that about 647,000 BTC had been transferred out. The incident occurred at the exchange’s custody and operations layer and did not amount to a breach of Bitcoin’s consensus ledger; it also showed that once users hand coins to an intermediary, the actual risks include private key control, internal ledgers, withdrawal liquidity, cybersecurity, and bankruptcy recovery.⁠[23]

On February 5, 2015, a jury found Ross Ulbricht guilty on all seven counts he faced; on May 29, a federal court sentenced him to life in prison and ordered the forfeiture of about $184 million. The judgment addressed conduct such as operating a darknet criminal marketplace, drug distribution, computer hacking, and money laundering, and did not hold that using Bitcoin is itself a crime. The case demonstrated that using Bitcoin for illegal transactions does not eliminate traditional criminal liability, and that on-chain fund flows, device forensics, communications records, and control of the platform can together serve as evidence.⁠[14]

On July 4, 2015, after BIP 66’s strict DER signature rules reached their enforcement threshold, a miner that had not upgraded produced an invalid block; about half of the hash power at the time was not fully validating parent blocks and kept mining on top of the invalid block, forming an invalid branch of six blocks. On July 5, another invalid branch of three blocks appeared. Full nodes running newer Bitcoin Core rejected these blocks, but some older software and lightweight wallets may have shown false confirmations. The incident showed that hash power cannot replace rule validation, and that miners, wallets, and services do not share the same security assumptions about “confirmations.”⁠[24]

On December 21, 2015, BIP 141 was assigned its number, proposing Segregated Witness (SegWit). It separates witness data such as signatures from the traditional calculation of transaction identifiers, introduces block weight accounting, and defines backward-compatible witness programs. Its goals include fixing a class of malleability problems in which third parties can alter transaction identifiers, expanding effective data capacity, and providing a more reliable foundation for layer-two protocols such as payment channels that depend on stable transaction identifiers.⁠[25]

On January 14, 2016, Joseph Poon and Thaddeus Dryja released the Lightning Network paper. The scheme has participants first lock funds with an on-chain transaction and then exchange updatable commitment transactions within a bidirectional payment channel; hashed timelock contracts allow payments to be routed across multiple channels, and settlement on the main chain is needed only when channels are opened or closed or when disputes arise. It aims for higher speed and lower costs for small payments, but introduces additional requirements such as liquidity, online monitoring, channel routing, backups, and implementation security. The Lightning Network is a layer-two protocol built on top of Bitcoin and does not automatically turn all on-chain transactions into instant payments.⁠[26]

On July 9, 2016, block height 420,000 triggered the second halving, reducing the per-block subsidy from 25 BTC to 12.5 BTC. Halvings are executed by block height rather than by calendar date, so the date can only be determined after the block is actually produced. As the subsidy declines, the relative role of transaction fees in miner revenue may increase; network security still depends on miner revenue, the distribution of hash power, node validation, and users’ demand for settlement security, rather than on any single metric. BTC’s daily reference price that day was about $652.⁠[18][13]

On August 1, 2017, disputes over block capacity and the scaling path produced incompatible rules, and Bitcoin Cash forked from the shared history and adopted a larger on-chain block capacity. It cannot simply be described as “created by Bitmain or Jihan Wu”: in April 2017, Bitmain had put forward a UAHF contingency concept in response to BIP148, and Jihan Wu, as a co-founder, was an important driving force; ViaBTC subsequently opened related trading support, and the Bitcoin ABCABCABC (American Broadcasting Company) is an American commercial broadcast television network. It grew out of NBC’s Blue radio network, took its name after becoming independent in 1943, developed into a national television network after merging with United Paramount Theatres in 1953, was acquired by Capital Cities in 1985, and has been owned by The Walt Disney Company since 1996. With CBS and NBC it is one of the three traditional U.S. broadcast networks, and it is one of the five networks that rotate in the White House television pool.Open the full entry developer team, founded and led by Amaury Séchet, advanced an executable software implementation. Bitmain also stated at the time that although it had an investment relationship with ViaBTC, ViaBTC operated independently, and Bitmain itself still supported SegWit2x. It is more accurate to say that Bitmain and Jihan Wu were important advocates and resource backers in the birth of BCH, rather than its sole creators or controllers. After the fork, the two networks each validated transactions, accumulated work, and formed independent assets; Bitcoin Cash was also not an upgrade jointly accepted by all Bitcoin nodes. BTC’s daily reference price that day was about $2,727.⁠[27][28][29][13]

On August 24, 2017, SegWit activated on the Bitcoin mainnet. The upgrade did not simply change the traditional 1 MB limit into a larger fixed number; instead, it used weight to distinguish base data from witness data, allowing blocks containing witnesses to carry more effective transaction data; at the same time, the new transaction identifier rules reduced third-party malleability problems. The activation process involved miner signaling, node software, and user pressure, showing that even a backward-compatible soft fork can go through prolonged coordination and governance disputes. BTC’s daily reference price that day was about $4,326.⁠[30][13]

Around October 24, 2017, Bitcoin Gold forked from Bitcoin’s shared history, attempting to change the conditions for participating in mining with a different proof-of-work algorithm. Several other forked assets that reused the “Bitcoin” name and history also appeared in 2017, and some of these forks later split further. These networks have different rules, development teams, hash power, and security boundaries; a name or shared history does not mean they are still part of the Bitcoin mainnet, and readers should also distinguish among protocol forks, ordinary software upgrades, and new tokens issued on the market.⁠[31]

On December 1, 2017, the Chicago Mercantile Exchange and the Cboe Futures Exchange self-certified new Bitcoin futures contracts with the U.S. Commodity Futures Trading CommissionCommodity Futures Trading CommissionThe U.S. Commodity Futures Trading Commission (CFTC) is an independent federal agency created by the Commodity Futures Trading Commission Act of 1974 and operating since 1975 to regulate futures, options and swaps markets; it has treated bitcoin and other virtual currencies as commodities since 2015 and has been chaired since December 22, 2025 by Michael Selig.Open the full entry, and Cantor Exchange at the same time certified Bitcoin binary options. Regulated derivatives brought Bitcoin price risk into traditional clearing and margin systems, but this did not mean regulators endorsed the spot market, trading platforms, or the value of Bitcoin; futures also introduce risks such as leverage, basis, forced liquidation, and counterparty rules that differ from on-chain self-custody. BTC’s daily reference price that day was about $10,809.⁠[32][13]

On September 20, 2018, Bitcoin Core disclosed CVE-2018-17144. The vulnerability was initially fixed as a denial-of-service issue, and further analysis found that some older versions also carried a potential inflation risk under a specific double-spend construction; patched versions such as 0.16.3 were released before full details were made public. The project said it had found no evidence that the vulnerability had actually been exploited. The incident again showed that consensus security depends not only on cryptographic design but also on implementation audits, responsible disclosure, timely node upgrades, and consistent handling of edge cases across different implementations. BTC’s daily reference price that day was about $6,499.⁠[33][13]

On January 19, 2020, BIP 341 was assigned its number, forming the Taproot consensus specification. Taproot combines Schnorr signatures with Merkleized script branches: in normal cooperative cases, funds can be spent through the aggregated key path, and complex conditions reveal only the relevant script path when actually used. It can reduce the on-chain data of some complex transactions, make certain multisignature and single-signature spends look more alike, and provide a more flexible building foundation for later protocols, but it does not automatically make all transactions anonymous or lower all transaction fees. BTC’s daily reference price that day was about $8,687.⁠[34][13]

On May 11, 2020, block height 630,000 triggered the third halving, reducing the per-block subsidy from 12.5 BTC to 6.25 BTC. The subsidy reduction does not change existing UTXOs or directly change the balances in users’ wallets; it changes only the cap on the subsidy that new blocks are allowed to create. Miners can still collect transaction fees, and full nodes reject blocks whose coinbase transaction claims more than the rules allow. BTC’s daily reference price that day was about $8,592.⁠[18][13]

On August 11, 2020, MicroStrategyStrategyStrategy (formerly MicroStrategy) is a Nasdaq-listed company (ticker MSTR) headquartered in Tysons Corner, Virginia, United States, founded in 1989 by Michael Saylor and originally built on enterprise analytics software. Since 2020, the company has used bitcoin as its primary treasury reserve asset and describes itself as the world’s first and largest Bitcoin Treasury Company; as of September 27, 2026, it held 847,666 bitcoins. Its current Chief Executive Officer is Phong Le.Open the full entry announced in an 8-K filing with the U.S. Securities and Exchange Commission that it had purchased 21,454 BTC for about $250 million and incorporated the investment into its capital allocation strategy. This became an early representative case of a public company holding Bitcoin at scale on its balance sheet and fueled the “corporate treasury reserve” narrative; at the same time, corporate holdings pass Bitcoin price, custody, accounting, financing, and corporate governance risks on to shareholders and cannot be equated with risk-free cash management. BTC’s daily reference price that day was about $11,393.⁠[35][13]

On November 3, 2020, U.S. law enforcement seized tens of thousands of bitcoin from an address linked to Silk Road funds, valued at more than $1 billion the following day. The Justice Department said investigators had identified 54 previously undetected transfers by analyzing on-chain transactions from 2011 to 2013, and that the funds were allegedly stolen from Silk Road by “Individual X.” The case illustrated the dual nature of public blockchains: addresses do not directly show real names, but long-term transaction graphs, trading platform records, and device evidence may, years later, link fund flows to specific conduct.⁠[36]

On June 8, 2021, El Salvador’s legislature passed the Bitcoin Law, which was published in the official gazette on June 9, making the country the first to recognize Bitcoin as legal tender through legislation. The original law required broader acceptance of Bitcoin and set out public arrangements such as instant conversion to U.S. dollars. National-level adoption expanded the institutional experiment with Bitcoin as a payment and reserve asset, and also brought controversies over price volatility, fiscal exposure, consumer protection, anti-money laundering, and infrastructure availability. BTC’s daily reference price that day was about $37,373.⁠[37][13]

The Bitcoin Law took effect on September 7, 2021, 90 days after its publication in the official gazette. The government launched the Chivo wallet and conversion infrastructure, and implementation of the law connected the on-chain network, custodial wallets, merchant payments, dollar conversion, and public finances. Thus “a country adopting Bitcoin” does not refer only to a change at the protocol layer: residents’ actual experience depends on wallet operations, network access, conversion liquidity, merchant willingness, regulatory enforcement, and the costs borne by the government. BTC’s daily reference price that day was about $46,854.⁠[37][13]

On September 16, 2021, a statue commemorating Satoshi Nakamoto, Bitcoin’s anonymous creator, was unveiled at Graphisoft Park in Budapest, Hungary. The project was initiated by András Györfi, an editor at Kripto Akadémia, and sculptors Réka Gergely and Tamás Gilly took part in making it. The statue commemorates the ideas and community behind the pseudonym, rather than proving that any particular real person is Satoshi Nakamoto. BTC’s daily reference price that day was about $47,797.⁠[38][13]

On November 14, 2021, Taproot activated at block height 709,632, and upgraded nodes began enforcing BIP 341 and other new rules. Taproot introduced native Schnorr signatures and P2TR outputs, giving key-path spending, script-path spending, and complex cooperative schemes a more unified foundation. Activation only means the consensus rules are available; wallets, exchanges, hardware signers, and layer-two protocols still have to implement sending, receiving, backup, and security audits individually, and adoption of the features does not happen automatically on the day of activation. BTC’s daily reference price that day was about $65,032.⁠[39][13]

On November 7, 2022, the U.S. Justice Department announced that James Zhong had pleaded guilty to wire fraud, and stated that law enforcement had seized about 50,676 BTC from his home in November 2021. Case materials state that in 2012 Zhong exploited a flaw in Silk Road’s withdrawal processing, using multiple accounts to trigger bitcoin withdrawals exceeding his initial deposits; the seized assets were valued at more than $3.36 billion at the time. The case is distinct from the 2020 “Individual X” funds, and again showed that relatively unsophisticated platform accounting flaws, private key control, and on-chain tracing are security issues at different levels.⁠[40]

On November 11, 2022, FTXFTXFTX was a cryptocurrency exchange founded in 2019 by Sam Bankman-Fried and Gary Wang that operated FTX.com, moved its headquarters from Hong Kong to the Bahamas in 2021 and was valued at $32 billion in January 2022. In November 2022 it filed for U.S. bankruptcy protection amid a liquidity crisis, and Bankman-Fried was later convicted of fraud and related charges. Its reorganization plan took effect in January 2025, after which the FTX Recovery Trust began paying creditors in stages.Open the full entry and about 100 affiliated entities filed for U.S. bankruptcy protection. Later lawsuit filings by the U.S. Securities and Exchange Commission state that customer funds had been diverted and used, and that the platform also faced a huge funding shortfall. FTX was not part of the Bitcoin protocol, but its collapse again drew the distinction between on-chain assets and intermediary liabilities: the balances users see on a centralized platform depend on the platform’s ledger, asset segregation, governance, audits, and ability to process withdrawals; an “exchange collapse” cannot be described as the Bitcoin blockchain ceasing to operate, but it does affect markets, liquidity, and public trust. BTC’s daily reference price that day was about $16,917.⁠[41][13]

Around January 2023, the Ordinals project began to bring ordinal theory and inscriptions into widespread use on the Bitcoin mainnet. It numbers satoshis in the order in which they were mined and places content such as text and images in an envelope structure within Taproot witness data; the content is carried by Bitcoin blocks, but the numbering, indexing, and display rely on additional software conventions and are not an NFT standard defined directly by Bitcoin consensus. Inscriptions broadened the uses of block space and also intensified debates over the fee market, node resources, non-payment data, and responsibility for content.⁠[42]

On June 15, 2023, iSharesiSharesiShares is the exchange-traded fund (ETF) brand of the asset manager BlackRock. It grew out of the WEBS country index funds, which began operating in 1996, was run under the iShares name by Barclays Global Investors from 2000, and passed to BlackRock in 2009 when BlackRock acquired Barclays Global Investors. As of September 30, 2026, BlackRock’s ETF assets under management were about $6.36 trillion, with products spanning equities, bonds, commodities and digital assets.Open the full entry Delaware Trust Sponsor filed an S-1 registration statement for the iShares Bitcoin Trust with the U.S. Securities and Exchange Commission, proposing that the trust hold Bitcoin and issue shares tradable on the securities market. The filing prompted institutions including BlackRockBlackRockBlackRock is a publicly traded investment management company headquartered in New York, founded in 1988 by Larry Fink and seven others and listed on the New York Stock Exchange (ticker BLK); its businesses include the iShares family of exchange-traded funds and the Aladdin investment and risk management platform. As of June 30, 2026, its assets under management totaled $15.3 trillion.Open the full entry, Fidelity, ARK 21Shares21Shares21Shares is an issuer of crypto asset exchange-traded products (ETPs) headquartered in Zurich, Switzerland, which lists physically backed crypto ETPs on several European exchanges and issues products in the United States such as the ARK 21Shares spot Bitcoin ETF; in November 2025 it was acquired by the digital asset prime broker FalconX.Open the full entry, Bitwise, Invesco, VanEck, WisdomTree, Valkyrie, and Franklin to file or amend spot Bitcoin product proposals in succession during 2023. A filing does not equal approval; the product structure also required regulatory review of exchange rules, custody, pricing, creation and redemption, and anti-manipulation arrangements. BTC’s daily reference price that day was about $25,559.⁠[43][44][13]

On August 29, 2023, the U.S. Court of Appeals for the District of Columbia Circuit found that the SEC had not adequately explained why it allowed ETPs holding Bitcoin futures but rejected Grayscale’s proposal to convert its spot Bitcoin trust, and therefore vacated the original rejection and remanded the matter for reconsideration. The court did not directly order the SEC to approve any product, nor did it rule that Bitcoin itself is safe or suitable for investment; it required the regulator to treat similar products with consistent and adequate reasoning. In its 2024 approval order, the SEC explicitly cited the ruling as important background for its reconsideration. BTC’s daily reference price that day was about $27,672.⁠[44][13]

On January 10, 2024, the U.S. Securities and Exchange Commission approved 11 exchange rule changes at once, allowing the following spot Bitcoin exchange-traded products (commonly called “spot Bitcoin ETFs”) to list and trade: Grayscale Bitcoin Trust, Bitwise Bitcoin ETF, Hashdex Bitcoin ETF, iShares Bitcoin Trust, Valkyrie Bitcoin Fund, ARK 21Shares Bitcoin ETF, Invesco Galaxy Bitcoin ETF, VanEck Bitcoin Trust, WisdomTree Bitcoin Fund, Fidelity Wise Origin Bitcoin Fund, and Franklin Bitcoin ETF. What was approved were the rules for listing and trading the products, not an endorsement of Bitcoin itself. Then-Chair Gary Gensler at the same time reminded investors that Bitcoin remains speculative and volatile, and that the products also introduce risks such as concentrated custody, management fees, securities market trading hours, and share structures. BTC’s daily reference price that day was about $46,818.⁠[44][45][13]

On April 20, 2024, block height 840,000 triggered the fourth halving, reducing the per-block subsidy from 6.25 BTC to 3.125 BTC. All four halvings to date have occurred at 210,000-block intervals. Over the long term, the newly issued subsidy will keep declining toward zero, and miners’ revenue structure will rely more on transaction fees; but how future fee demand, hash power costs, miner concentration, and the security budget will evolve is a question shaped jointly by economics and technology, and cannot be derived from the fixed supply formula alone. BTC’s daily reference price that day was about $64,908.⁠[18][13]

By UTC date, on December 5, 2024, the spot price of Bitcoin broke above $100,000 per coin for the first time. Total market capitalization, calculated as circulating supply multiplied by market price, was then close to $2 trillion; some real-time cross-asset rankings at one point placed Bitcoin at about seventh in the world. Prices, market capitalization, and rankings change quickly depending on the time of trading, the data source, and the definition of “asset,” and cannot be treated as in-protocol metrics or as indicating future returns. This milestone reflects changes in market pricing and institutional participation, and does not change Bitcoin’s issuance rules, transaction confirmation, or consensus security.⁠[46][47]

On January 21, 2025, the U.S. president issued a full pardon to Ross William Ulbricht, ending the continued enforcement of his 2015 life sentence. The pardon changed his personal criminal consequences; it did not undo the historical facts that Silk Road had been shut down and the related bitcoin seized, nor did it change the Bitcoin network’s rules. Silk Road’s trajectory, from operation in 2011, shutdown in 2013, and conviction and sentencing in 2015 to subsequent tracing of funds and the 2025 pardon, illustrates the relationship among technology, platform operations, criminal liability, and political decisions, which are independent of one another yet mutually influential.⁠[48]

On January 29, 2025, El Salvador’s legislature amended the Bitcoin Law through Decree No. 199, which was published on January 30 and set to take effect 90 days later. The amendment explicitly made acceptance of Bitcoin by private parties voluntary, removed provisions such as paying taxes in Bitcoin, and restricted public-sector participation; this substantially weakened the original law’s mandatory legal-tender character. The change showed that national adoption is not a one-way process, and that policy is readjusted in light of fiscal costs, actual usage, financial stability, and international financing conditions. BTC’s daily reference price that day was about $103,919.⁠[49][13]

On March 6, 2025, the U.S. president signed an executive order directing the Treasury Department to establish a “Strategic Bitcoin Reserve,” initially funded with BTC finally forfeited to the federal government that is not required to be returned or used for other statutory purposes, and providing that government BTC deposited into the reserve is in principle not to be sold. The order also allows the Treasury and Commerce Departments to study strategies for acquiring additional bitcoin without adding costs to taxpayers. The arrangement is a government asset-management policy; it does not change the rules of the Bitcoin protocol, nor does it mean that the United States has made BTC legal tender. BTC’s daily reference price that day was about $90,222.⁠[50][13]

On February 10, 2026, the BIP 360 draft updated the proposal’s name to Pay-to-Merkle-Root (P2MR). It proposes a new output type that eliminates Taproot-style key-path spending and hides the public key behind a hash commitment, thereby reducing the risk of quantum attacks after long-term public key exposure; however, the draft states explicitly that it cannot address the short exposure between a transaction’s broadcast and its confirmation, and that future post-quantum signature schemes are still needed. BIP 360’s status remains Draft, and it has not become a consensus upgrade activated on the Bitcoin mainnet. BTC’s daily reference price that day was about $68,689.⁠[51][13]

On February 11, 2026, BIP 361 proposed, as an Informational draft, a roadmap for “post-quantum migration and the retirement of legacy signatures”: provided that a future post-quantum signature scheme becomes available, it would first stop new funds from being sent to legacy outputs vulnerable to quantum attack, and then at a later stage restrict spending with legacy ECDSA and Schnorr signatures. The phase intervals given in the draft are measured in years, and it involves major controversies such as whether existing funds could continue to be moved. It is not a settled activation plan and has not changed current mainnet rules. BTC’s daily reference price that day was about $66,990.⁠[52][13]

BIP 110 had proposed a temporary soft fork that sought to re-tighten some arbitrary-data uses at the consensus layer, with a 55% activation threshold and mandatory signaling rules. On August 9, 2026, the proposal’s status was changed to Closed; its changelog states explicitly that it was closed after a chain split occurred and mining stalled. More precisely, this was a minority chain-fork attempt that did not obtain broad consensus on the Bitcoin mainnet and ultimately stalled, rather than an upgrade completed by the Bitcoin mainnet. BTC’s daily reference price that day was about $64,865.⁠[53][13]

On August 26, 2026, StarkWareStarkWareStarkWare is a blockchain technology company headquartered in Netanya, Israel, founded in 2018 by STARK proof co-inventor Eli Ben-Sasson and others. It uses zero-knowledge proofs to provide scaling, privacy and quantum-resistance solutions for Ethereum and other blockchains, has developed the StarkEx scaling engine, the Cairo programming language and the Stone and S-two provers, and leads development of the layer-2 network Starknet; its last funding round, in 2022, valued it at $8 billion.Open the full entry announced that its QSB scheme had completed a “quantum-safe” transaction experiment confirmed in a Bitcoin mainnet block. Without modifying Bitcoin’s consensus rules, the scheme adds a second, hash-based spending lock, demonstrating an application-layer protection path. Because the “first” claim and the security characterization come from the project’s own announcement, the event should be described with attribution; what it demonstrates is an experiment compatible with current rules, not that Bitcoin has completed a network-wide quantum-resistance upgrade. BTC’s daily reference price that day was about $78,955.⁠[54][13]