#美国加密立法 Bitcoin (BTC) is the world's first cryptocurrency, created by Satoshi Nakamoto in 2009, based on blockchain technology to implement a decentralized peer-to-peer payment system. The total supply of Bitcoin is fixed at 21 million, giving it scarcity, and it is often regarded as 'digital gold'. It operates without a central authority, with transactions being transparent and immutable, attracting investors, institutions, and certain countries. Its price is highly volatile, presenting both investment potential and high risk. In recent years, as Bitcoin has gradually entered the mainstream financial system, such as ETFs and compliant exchanges, it is evolving from a speculative asset into a global store of value.