Bitcoin (BTC) is currently the most widely used digital currency. First released on 3 January 2009, it is a digital cryptocurrency for point-to-point (P2P) transmission, with a total of 21 million. The Bitcoin network releases a certain amount of coins in every 10 minutes and is expected to reach its limit in 2140. Bitcoin is known as ""digital gold"" to the investors. Bitcoin is generated by a large number of calculations according to a specific algorithm. It does not rely on a specific financial institution to issue them. It uses a distributed database composed of many nodes in the entire P2P network to confirm and record all transaction behaviors, and uses cryptography to ensure currency circulation. Link security ensures that token values cannot be manipulated manually by making large amounts of bitcoin. Cryptographic-based design allows Bitcoin to be transferred, paid, and redeemed only by the real owner. It also ensures the anonymity of currency ownership and circulation transactions. CoinGecko:https://www.coingecko.com/en/coins/bitcoin CoinMarketCap:https://coinmarketcap.com/currencies/bitcoin/