The block height of the Bitcoin network reached 709632 at 13:18 BST on November 14, activating the Taproot soft fork upgrade of Bitcoin. Taproot was announced by Bitcoin core developer Greg Maxwell in 2018. The upgraded Bitcoin network introduced the Schnorr signature scheme, MAST (Merkle tree) data structure and Tapscript new scripting language, The combination "will extend bitcoin's smart contract flexibility while providing more privacy by allowing users to mask complex smart contracts with regular Bitcoin transactions".

ProShares' Bitcoin futures ETF has begun trading on the New York Stock Exchange under the ticker BITO, opening at $40.89.

Twitter officially launches Bitcoin-enabled tipping: Twitter announced that it has launched a Bitcoin-enabled tipping feature in the iOS version of its App and will roll it out to Android users in the coming weeks. In response to a user's question about tipping in cryptocurrencies, Twitter said the Strike wallet can be used to pay for purchases through The Lightning network, or to transfer money directly if the user shows his Or her Bitcoin address.

Bitcoin reaches block height 709632, Taproot soft fork upgrade has been activated. Taproot, announced in 2018 by Core Bitcoin developer Greg Maxwell, will dramatically increase the flexibility of Bitcoin smart contracts by combining Schnorr signatures with Merkel's Abstract Syntax Tree (MAST) and Tapscript's new scripting language, While enhancing bitcoin's privacy and scalability.

Bitcoin's Taproot upgrade will take place through a hard fork on November 16, 2021, and will implement three new Bitcoin Improvement proposals (BIPs), all of which will be merged into the latest version of Bitcoin. Bip-340, BIP-341, and BIP-342 were proposed as early as January 2020 by Greg Maxwell, a well-known Bitcoin developer. By the end of 2020, 74% of the three proposals had been approved by miners; By mid-2021, the miner approval rate for these proposals exceeded 90 percent, meaning that all three proposals were finally ready for launch. More than 90% of bitcoin miners have already approved the upgrade, which means we won't see a computational battle like the one between BCH and BSV in 2018. The new mainnet code has been peer-reviewed by over 150 developers, which gives us confidence that we should not see any network fragmentation happening.

ProShares' Bitcoin futures ETF has begun trading on the New York Stock Exchange under the ticker BITO, opening at $40.89.

El Salvador's President Michel Bukel first announced that Bitcoin would become legal tender in his country at the Bitcoin 2021 conference on June 5. On June 9, El Salvador's legislative Assembly passed the Bitcoin Law by an absolute majority of 62 votes in favor of 22 votes against, and the proposal took effect within 90 days. Since then, El Salvador has officially become the first country in the world to legalize bitcoin. On June 24, Buker announced a $135 million bitcoin airdrop to give away $30 to each newly created account.

Bitcoin topped $60,000.

Bitcoin halved for the third time at block height 630,000, with rewards reduced by 50%, block rewards reduced from 12.5 BTC to 6.25BTC, and inflation reduced to 1.79%.

On March 9, bitcoin core version 0.19.1 was released. On June 3, bitcoin core version 0.20.0 was released.

Bitcoin suffered black Thursday, falling as much as 43% on the day.

On May 2, the core bitcoin version 0.18.0 was released. On August 9, bitcoin core version 0.18.1 was released. On November 24, bitcoin core version 0.19.0.1 was released.

The Political Bureau of the CPC Central Committee has proposed to take blockchain as an important breakthrough in independent innovation of core technologies and accelerate the innovation and development of blockchain technology and industry.

Bakkt, a cryptocurrency derivatives exchange owned by INTERCONTINENTAL Exchange Group (ICE), officially launched physically settled Bitcoin (BTC) futures trading on September 23, 2019.

Bitcoin topped $10,000 again.

The price of bitcoin suddenly shot up, hitting $5,000 at one point.

On February 26, bitcoin core version 0.16.0 was released. In March, Lightning network launched the main bitcoin network. On December 25, bitcoin core version 0.17.1 was released.

Bitcoin branched into two currencies, BTG and BCH; On January 3, the core bitcoin version 0.13.2 was released. On March 8, bitcoin core version 0.14.0 was released. On September 14, bitcoin core version 0.15.0 was released.

Bitcoin hit a record high of $20,000.

Bitcoin hit a high of $19,783.06. At the end of the day, bitcoin will drop to $19,500. Overall, the price of bitcoin rose 1,824% from January 1 to December 17.

CBOE Global Markets Inc. launched bitcoin futures trading on Dec. 10, 2017, under the trading symbol "XBT."

Lightning network launched bitcoin main network.

The People's Bank of China and other seven ministries and commissions jointly issued a Notice on Preventing financing Risks in The Issuance of Coins.

Isolated Witness activation, Bitcoin's first forked coin, Bitcoin Cash/BCash, was born.

Bitcoin gets Unicode compliance at ₿.

Bitcoin rewards halved twice.

Bitcoin halved for the second time at the block height of 420000, with the block reward dropping from 25 BTC to 12.5 BTC and inflation dropping to 4.17%.

General Provisions of the Civil Law delimit the scope of protection for virtual Assets (The 21st Session of the 12th NPC Standing Committee was held in Beijing in June 2016, at which the explanation of the draft General Provisions of the Civil Law of the People's Republic of China submitted by the Chairman of the NPC Standing Committee was deliberated for the first time. The draft stipulates new civil right objects such as network virtual property and data information, which means that network virtual property and data information will officially become the right object, and network virtual property such as bitcoin will officially be protected by law.

Japan's Upper house approved a bill to regulate domestic digital currency exchanges on May 25, 2016, which classifies Bitcoin as an asset or property.

The developers of OpenBazaar, a decentralized e-commerce protocol, released its first official version of software on April 5, 2016. OpenBazaar enables peer-to-peer digital commerce and uses Bitcoin as a payment method, akin to a decentralized taobao.

The computing power of bitcoin network exceeds 1EH/S; On February 23, bitcoin core version 0.12.0 was released. On August 23, bitcoin core version 0.13.0 was released.

Bitcoin Securities Offering (The U.S. Securities and Exchange Commission gave online retailer Overstock permission to issue its shares via the Bitcoin blockchain. According to Overstock's S-3 filing with the SECURITIES and Exchange Commission, the company hopes to issue up to $500 million in new securities, including common stock, preferred stock, depositary receipts, warrants, bonds and more, via blockchain.)

The European Court of Justice ruled on 22 October 2015 that transactions in Bitcoin and other virtual currencies would be exempt from VAT. The decision will be a major victory for bitcoin traders, who will not have to pay taxes on their future transactions.)

On February 16, bitcoin core version 0.10.0 was released. On November 13, bitcoin core version 0.11.2 was released.

On January 26, 2015, Coinbase launched the first licensed bitcoin exchange in the United States. On January 17, 2017, the head of the New York Department of Financial Services (NYDFS) announced that it had approved a license application for bitcoin exchange platform Coinbase.

Bitcoin network computing power reached 100PH/S; HMRC has classified bitcoin as an asset or private money, meaning that bitcoin mining or exchange is not subject to VAT; The US government auctioned off more than 29,000 bitcoins confiscated from the Silk Road, indicating that bitcoin is no longer considered an illegal currency for trading; Making the first bitcoin derivative trade; Microsoft, Dell and others accept bitcoin as payment.

The global computer giant Microsoft has announced it will accept Bitcoin as a payment option, allowing consumers to use it to buy a variety of digital content on its online platform. Consumers in the United States can top up their Microsoft accounts with Bitcoin, according to the payment information page on Microsoft's official store.

The French Ministry of Economy and Finance said it would impose regulations on financial institutions and individual users of Bitcoin and other digital currencies by the end of the year. "While the current volume of virtual currencies is unlikely to have an impact on the economic system, these unofficial currencies are growing and there are risks of illegality or fraud." )

Wojciech Kowalczyk, Poland's deputy finance minister, released a document confirming bitcoin as a financial instrument under Poland's existing financial regulations.

In mid-March, the People's Bank of China issued a notice on Further Strengthening the Prevention of Bitcoin risks, forbidding domestic banks and third-party payment institutions to provide bitcoin exchange platforms with account opening, top-up, payment, withdrawal and other services.

Bitcoin China and OKCoin, two major Bitcoin exchanges in China, announced the suspension of renminbi top-up services. Since then, the price has fallen to rmb2,011.)

The People's Bank of China and other five ministries and commissions of The People's Bank of China issued a notice on preventing the risks of Bitcoin, clarifying that bitcoin does not have the same legal status as currency, and cannot and should not be used as a currency in the market. After the announcement, the unit price of bitcoin plunged that day.

Bitcoin surpassed gold for the first time (bitcoin traded at $1,242 on Mt.Gox, while gold was trading at $1,241.98 an ounce at the same time).

The price of bitcoin soared to $1,000.

Bifurcation problem; In October, the first Bitcoin ATM was launched; The first bitcoin theft; The Us Financial Crimes Investigation Cooperation Bureau (FINCEN) issued the world's first virtual currency regulation; Germany recognizes bitcoin as legal; China has issued a notice on preventing bitcoin risks, making it clear that bitcoin does not have the same legal status as a currency.

Dedicated ASIC Avalon Bitcoin mining machine launched.

The first "halving" event occurred when the bitcoin blockchain halved its mining reward from 50 BTC to 25 BTC after completing 210,000 blocks, and the inflation rate dropped from 12.5% to 8.3%.

Bitcoin fund created.

The official version of 0.3.21 with historical records was launched, supporting new features including UPNP and cong as a unit, and the bitcoin system gradually matured.

The first major hacking incident in bitcoin's history occurred when 25,000 BTCS were stolen, worth $2,500 at the time.

Wikileaks launches Bitcoin donation address.

The first fake coin namecoin (NMC) was born.

The establishment of Mt. Gox, a website that allows users to buy and sell Bitcoins. By February 2014, it was processing 70% of global bitcoin transactions.

Nakamoto posted his last message on the bitcointalk.org forum.

The world's first mining pool, SlushPool, was excavated.

The Bitcointalk forum user Bitboy posted the Bitcoin logo showing ₿ in white and orange, which remains today in the form of "Rotation: Clockwise Clockwise by 14%."

Slush's Pool, the world's first "mining pool", was successfully excavated for the first time. Satoshi nakamoto retired and handed over the development rights to An American, Gavin Anderson.

Attackers exploited the integer overflow vulnerability to create 184 billion bitcoins out of thin air.

Gpu-based graphics card mining software appears. Mt.Gox started trading in Tokyo, and by February 2014, it was processing 70 percent of the world's bitcoin transactions.

Pizza Day in crypto: On May 22, 2010, Laszlo Hanyecz, a crypto community member, bought two pizzas for 10,000 BTC.

Bitcointalk forum member "DWDollar" proposed to create the first bitcoin exchange, Bitcoinmarket.com. On March 17, 2010, Bitcoinmarket.com was officially launched.

First Bitcoin transaction: On January 12, 2009, Satoshi sent Halfeni 10 Bitcoins as a test transaction.

Bitcoin launches open source client: It can be downloaded from SourceForge. From here, any technologically-literate person can download the client and start mining on Bitcoin.

The first Bitcoin block named Genesis was launched. Satoshi Nakamoto obtained the first 50 bitcoins by mining, marking the emergence of the Bitcoin network and the official birth of bitcoin.

Satoshi Nakamoto published bitcoin's Genesis thesis: "Bitcoin: A Peer-to-peer Cash Payment System."

Satoshi Nakamoto registered the domain Bitcoin.org.