$BTC Bitcoin ($BTC) is the first and most valuable cryptocurrency, often called digital gold. Created in 2009 by the anonymous Satoshi Nakamoto, Bitcoin introduced blockchain technology and peer-to-peer money transfer without intermediaries. It has a fixed supply of 21 million coins, making it deflationary. BTC is widely used for store of value, trading, and as a hedge against inflation. Its decentralized nature and limited supply drive its long-term appeal. Institutional adoption, ETFs, and mainstream integration continue to increase its demand and price.