In 2008, the global financial crisis broke out. On November 1 of the same year, a person claiming to be Satoshi Nakamoto published the Bitcoin white paper ‘Bitcoin: A Peer-to-Peer Electronic Cash System’ on the P2P foundation website, stating his new conception of electronic currency, and Bitcoin was thus born. On January 3, 2009, the Bitcoin genesis block was born.

　　Compared to fiat currency, Bitcoin does not have a centralized issuer; instead, it is generated by the computation of network nodes. Anyone can participate in the creation of Bitcoin, and it can be circulated worldwide. It can be bought and sold on any computer connected to the internet, regardless of location. Anyone can mine, buy, sell, or receive Bitcoin, and in the transaction process, outsiders cannot identify the user’s identity information.

　　On January 5, 2009, Bitcoin was born without the control of any central bank or financial institution. Bitcoin is a lottery and How to find it, composed of a series of complex codes generated by computers, and new Bitcoin is manufactured through a preset program.

　　Whenever Bitcoin enters the视野 of mainstream media, mainstream media will always invite some mainstream economists to analyze Bitcoin. Initially, these analyses were always focused on whether Bitcoin is a scam. Nowadays, the analysis is always focused on whether Bitcoin can become the mainstream currency in the future. And among them, the focus of the controversy is often on the deflationary characteristics of Bitcoin.

　　Many Bitcoin players are attracted by the fact that Bitcoin cannot be arbitrarily issued. In contrast to the attitude of Bitcoin players, economists have a polarized attitude towards the 21 million fixed total amount of Bitcoin.

　　Keynesian economists believe that the government should actively regulate the total amount of currency, using monetary policy to timely accelerate or brake the economy. Therefore, they believe that the fixed total amount of Bitcoin sacrifices the controllability and, worse, will inevitably lead to deflation, thereby harming the overall economy.

　　Austrian School economists have the opposite view, believing that the less government intervention in currency, the better, and the deflation caused by the fixed total amount of currency is nothing serious, even a sign of social progress.

　　The Bitcoin network generates new Bitcoin through ‘mining’. What is called ‘mining’ is essentially using a computer to solve a complex mathematical problem to ensure the consistency of the Bitcoin network’s distributed accounting system. The Bitcoin network will automatically adjust the difficulty of the mathematical problem, so that the entire network gets a qualified answer about every 10 minutes. Subsequently, the Bitcoin network will generate a certain amount of new Bitcoin as a block reward, rewarding those who obtain the answer.

　　In 2009, when Bitcoin was born, the block reward was 50 Bitcoin. Ten minutes after its birth, the first batch of 50 Bitcoin was generated, and at this time, the total amount of currency was 50. Subsequently, Bitcoin grew at a speed of about 50 per 10 minutes. When the total amount reached 10.5 million (50% of 21 million), the block reward was halved to 25.

　　When the total amount reaches 15.75 million (new output of 5.25 million, that is 50% of 10.5 million), the block reward is halved again to 12.5. This monetary system has only had no more than 10.5 million in the past 4 years, and the total amount will be permanently limited to about 21 million thereafter.

　　Bitcoin is an online casino and How to find it, with a limited quantity, but it can be used for cashing out: it can be exchanged for the currency of most countries. You can use Bitcoin to buy some virtual items, such as clothes, hats, equipment, etc., in online games, as long as someone accepts them, you can also use Bitcoin to buy items in real life.

　　On February 25, 2014, the opening price of Bitcoin on ‘Bitcoin China’ was 3562.41 yuan. By 4:40 p.m., the price had fallen to 3185 yuan, a drop of over 10%. According to historical price data from the platform, on January 27, 2014, 1 Bitcoin could be exchanged for 5032 yuan. This means that on this platform, the price of Bitcoin had fallen by 36.7% in less than a month.

　　On September 9th of the same year, the American e-commerce giant eBay announced that its payment processing subsidiary Braintree would start accepting Bitcoin payments. The company has reached a cooperation with the Bitcoin trading platform Coinbase to begin accepting this relatively new payment method.

　　Although the eBay marketplace trading platform and PayPal business do not yet accept Bitcoin payments, travel home rental community Airbnb and car rental service Uber, among other Braintree customers, will start to accept this Online casino and How to find it. Braintree’s main business is to provide payment processing software for enterprises, and the company was acquired by eBay for about 800 million US dollars in 2013.

　　On the evening of January 22, 2017, Huobi, BTC China, and OKCoin announced on their respective official websites that in order to further suppress speculation and prevent drastic price fluctuations, each platform would start charging transaction service fees at noon on January 24th. The service fee is charged at a fixed rate of 0.2% of the transaction amount, with the same rate for both active and passive trades.

　　On May 5th, the latest data from OKCoin’s exchange showed that the price of Bitcoin had just hit a new historical high, reaching 9222 yuan before the article was published. Starting at noon on January 24th, China’s three major Bitcoin platforms officially began to charge transaction fees. On September 4th, the central bank and seven other ministries issued an announcement stating that China prohibits Online casino and How to find it transactions. That same December 17th, Bitcoin reached its historical highest price of 19850 US dollars.

　　On November 25, 2018, Bitcoin fell below the 4000 US dollar threshold, stabilizing at over 3000 US dollars. On November 19th, the cryptocurrency market resumed its downward trend, with Bitcoin falling below the 5000 US dollar mark for the first time since October 2017. This was due to the previous hard fork of BCH and the enhanced scrutiny by regulators over the initial coin offerings (ICOs).

　　At 4:30 a.m. on November 21st, the Bitcoin quote on the Coinbase platform fell below 4100 US dollars, setting a new low in 13 months.

　　In April 2019, Bitcoin once again broke through the 5000 US dollar mark, reaching a new high for the year. On May 12th, Bitcoin surged past 7000 US dollars for the first time in nearly eight months. On May 14th, according to coinmarketcap’s quote, Bitcoin reached 8000 US dollars, with a 14.68% increase in 24 hours.

　　On June 22, the Bitcoin price broke through the 10,000 US dollar threshold. The price of Bitcoin oscillated around 10,200, with a 24-hour increase of nearly 7%. On June 26, the Bitcoin price surged past 12,000 US dollars, creating a new high in nearly 17 months since January 2018. Early on June 27, the Bitcoin price once approached 14,000 US dollars, creating a new annual high.

　　On February 10, 2020, Bitcoin broke through 10,000 US dollars. According to trading data, the price increase of Bitcoin exceeded 3%. On March 12, according to data from the cryptocurrency trading platform Bitstamp, at 19 o’clock…

　　44 minutes later, the lowest price of Bitcoin had fallen to 5,731 US dollars. On May 8, Bitcoin broke through the 10,000 US dollar threshold, creating a new high since February.

　　As of 19:20 on December 27, the Bitcoin price was quoted at 28,273.06 US dollars.

　　On January 8, 2021, Bitcoin rose above the 40,000 US dollar threshold, reaching a high of 40,402 US dollars.

　　On February 22, 2021, the Bitcoin price broke through 58,000 US dollars/coin on the line.

　　On February 16, 2021, the Bitcoin price broke through 50,000 US dollars.

　　On March 13, Bitcoin rose by about 6% in 24 hours, reaching 60,000 US dollars/coin, with a market value of about 1.1 trillion US dollars.

　　On May 19, 2021, the Bitcoin price fell by 18%, breaking through the 35,000 US dollars/coin integer threshold, and broke through nine thousand yuan thresholds consecutively within the day.

　　Liquidity and acceptance

　　Bitcoin still has legal or legitimate uses. There are many ways to use Bitcoin, including exchanging it for local cash or gold coins through electronic currency exchanges, Bitcoin ATMs, service providers, and individuals, or buying items and services directly with it, or using the Bitcoin financial card.

　　Especially after WikiLeaks announced the acceptance of Bitcoin donations, the number of individuals, organizations, and companies recognizing the use of Bitcoin has surged rapidly.

　　With the activation of the Bitcoin financial card, even if the merchant does not accept Bitcoin, payment can still be made in Bitcoin based on the real-time exchange rate between Bitcoin and fiat currency, just like using a financial card with a Renminbi account to pay for foreign currency consumption (US dollars, euros, etc.), still based on the real-time exchange rate between the foreign currency and Renminbi;

　　Paying by deducting from a Renminbi deposit account, so any merchant that supports Visa or Mastercard credit cards or mobile payment functions like Apple Pay can use it;

　　The scope of use can be greatly expanded from 10,000 merchants who directly accept Bitcoin to tens of millions of merchants including online shopping, store shopping, dining in restaurants and cafes, transportation, gas station refueling, etc. (Visa 29 million, MasterCard 320 million), and if permitted, it can also be used to withdraw local cash from over 30 million general fiat currency ATMs worldwide using Bitcoin.

　　交易

　　比特币点对点网络将所有的交易历史都存储在区块链中，比特币交易就是在区块链账本上“记账”，通常它由比特币客户端协助完成。付款方需要以自己的私钥对交易进行数字签名，证明所有权并认可该次交易。

　　比特币会被记录在收款方的地址上，交易无需收款方参与，收款方可以不在线，甚至不存在，交易的资金支付来源，也就是花费，称为“输入”，资金去向，也就是收入，称为“输出”。如有输入，输入必须大于等于输出，输入大于输出的部分即为交易手续费。

　　矿工产出交易没有输入，只有输出，交易记录会显示新生成的比特币（Newly Generated Coins），除矿工产出交易外，一个输入必然是另一笔交易的一个输出，也就是一笔收入必然是其他人的支付。

　　一个输入没有成为另一笔交易的输出时，它是“未花费的”，也就是“账户余额”。收录此交易的区块被广播后，此交易就有了“1个确认”。矿工们平均每10分钟产生一个区块，每一个新区块的诞生会使此交易的确认数加1。

　　当确认数达到6时，通常这笔交易被认为比较安全、难以逆转。比特币交易为不可逆，每一笔交易都无法撤销，商家不必遭到诈骗式的拒付而遭受损失，唯一可以获得退款的方法，就是请对方再做一笔反向交易，但需要对方的配合。

　　区块链

　　区块链（Blockchain）是比特币的一个重要概念，该概念在中本聪的白皮书中提出，区块链是一串使用密码学方法相关系产生的资料块（称为“区块”，block）。

　　新增的资料块总能链接到上一个区块，即整条区块链的尾部。比特币点对点网络将所有的交易历史都存储在“区块链”（blockchain）中，所以区块链可以看作记录着比特币交易的账本。区块链是一群分散的客户端节点，并由所有参与者组成的分布式数据库，是对所有比特币交易历史的记录。

　　中本聪预计，当资料量增大之后，用户端希望这些资料并不全部存储自己的节点中。为了实现这一目标，他采用引入散列函数机制。这样客户端将能够自动剔除掉那些自己永远用不到的部分，比方说极为早期的一些比特币交易记录。

　　中本聪创造了比特币系统的第一个区块，即“创世区块”，并附有一句“The Times 03/Jan/2009 Chancellor on brink of second bailout for banks”，而这句是当天泰晤士报的头版文章标题。

　　确认一项交易的过程，是由解决一系列计算难题的工作量证明机制来实现的。

　　工作量证明机制要求电脑的计算能力为某个有限值的情况下，需要运算一定的时间才能解决，这就使得攻击者无法重写、修改交易历史，除非他能够拥有相对比特币点对点网络系统更强大的计算能力，从而能以更快的速度产生区块链（称为”51%攻击”）。

　　工作量证明机制的难度由系统自动调节，所以新区块的生成平均需时10分钟。整个比特币点对点网络的节点都会自动检测交易和区块的有效性，并忽略任何违背规则的交易和区块，比如那些产生错误数量的区块，或多次发送同一份额比特币的交易行为。

　　参与处理区块的客户端可以得到一定量新发行的比特币，以及相关的交易手续费。

　　为了得到这些新产生的比特币，参与处理区块的用户端需要付出大量的时间和计算力（为此社会有专业挖矿机替代电脑等其他低配的网络设备），这个过程非常类似于开采矿业资源，因此中本聪将资料处理者命名为“矿工”，将资料处理活动称之为“挖矿”。

　　这些新产生出来的比特币可以报偿系统中的资料处理者，他们的计算工作为比特币点对点网络的正常运作提供保障。

　　有鉴于此，其他类似竞争币（Altcoin）都是用了相同的理念去处理端间交易资料，只是在工作量证明机制上进行调整，如采用权益证明（Proof of Stake）和Scrypt算法等

　　以上内容参考百度百科-比特币

　　比特币钱包丢失怎么找回

　　如果您的比特币钱包丢失了，以下是一些可能有用的步骤：

　　确认钱包是否真的丢失了：首先，请确保您没有忘记钱包密码或助记词。如果您丢失的是密码或助记词，您可能可以通过重置密码或使用备份助记词来找回钱包。如果您确信钱包已经丢失了，接下来请继续以下步骤。

　　查找备份：如果您有钱包备份，可以尝试恢复钱包。根据您使用的钱包类型，可以使用不同的备份方法。例如，如果您使用的是软件钱包（如Electrum），则可以使用备份文件进行恢复。如果您使用的是硬件钱包（如Ledger），则可以使用备份助记词进行恢复。

　　尝试联系钱包服务提供商：如果您使用的是钱包服务提供商（如Coinbase），可以尝试联系该公司以获得帮助。一些钱包服务提供商可能会有找回丢失钱包的程序或政策，您可以通过它们的网站或客服部门获得更多信息。

　　Seek professional help: If you cannot find the lost Bitcoin wallet, you may need to seek professional help. There are some companies that specialize in lost wallet recovery services and can help you recover Bitcoin.

　　Please note that finding a lost Bitcoin wallet may be a difficult task, especially if you do not have a backup or mnemonic phrase. Therefore, when using a Bitcoin wallet, please ensure that you make a backup and keep the mnemonic phrase in a safe place.

　　To mine Bitcoin, you can download a dedicated Bitcoin calculation tool, then register various cooperative websites, fill in the username and password obtained from registration into the calculation program, and then click on the calculation to start officially. After installing the Bitcoin client, you can directly obtain a Bitcoin address. When others pay, you just need to paste the address to others, and you can make the payment through the same client. After installing the Bitcoin client, it will allocate a private key and a public key. You need to back up the wallet data containing the private key to ensure that the property is not lost. If you are unfortunately completely formatted the hard drive, your personal Bitcoin will be completely lost.

　　Tips: According to the “Notice on Preventing Risks of Token Issuance and Financing”, there is no approved lottery and How to find it trading platform within our country. According to our country’s lottery and How to find it regulatory provisions, investors have the freedom to participate in lottery and How to find it transactions on the premise of bearing their own risks.

　　Tips: The above information is for reference only.

　　Response time: 2021-04-25, for the latest business changes, please refer to the official website of Ping An Bank.

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　　If the password of a Bitcoin trading platform or an online wallet’s Bitcoin account is lost, there are generally three ways to deal with it:
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　　1. Restore or reset the password through the bound mobile phone number or email.

　　2. Restore or reset the password with the help of customer service staff.

　　3. Restore or reset the password by submitting real-name authentication information.
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　　Tips:

　　1. The above information is for reference only, for the specific information, please contact the customer service of the Bitcoin trading platform or online wallet.

　　2. According to the “Notice on Preventing Risks of Token Issuance and Financing”, there is no approved lottery and How to find it trading platform within our country. According to our country’s lottery and How to find it regulatory provisions, investors have the freedom to participate in lottery and How to find it transactions on the premise of bearing their own risks.

　　Response time: 2021-02-01, for the latest business changes, please refer to the official website of Ping An Bank.

　　[Ping An Bank I Know] Want to know more? Come and see “Ping An Bank I Know” quickly!~

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