$BTC Bitcoin ($BTC) is the first and most well-known cryptocurrency, created in 2009 by the pseudonymous Satoshi Nakamoto. It operates on a decentralized blockchain network, enabling peer-to-peer transactions without intermediaries like banks. Bitcoin's supply is capped at 21 million coins, making it a deflationary asset. Its value is driven by scarcity, adoption, and market demand. Often called "digital gold," BTC is seen as a store of value and hedge against inflation. Despite volatility, it has gained institutional interest and mainstream acceptance. Bitcoin's security relies on proof-of-work mining, though its energy consumption remains controversial. It remains the dominant crypto by market cap.