$BTC Bitcoin (BTC) is the world's first decentralized digital currency, launched by Satoshi Nakamoto in 2009. It is based on blockchain technology and enables transactions through a peer-to-peer network without the need for third-party institutions. The total supply of Bitcoin is capped at 21 million coins, which gives it scarcity and is regarded as "digital gold." Its price is highly volatile and influenced by factors such as policies and market sentiment. It is widely used for investment, payment, and value storage, and its influence in the global financial system is increasingly significant.