$BTC Bitcoin (BTC) is the world’s first and most well-known cryptocurrency, created in 2009 by the mysterious Satoshi Nakamoto. It operates on a decentralized, peer-to-peer network using blockchain technology, which ensures transparency and security without the need for intermediaries like banks. Bitcoin has a fixed supply of 21 million coins, making it a deflationary asset often referred to as "digital gold." It is widely used as a store of value, investment asset, and, to a lesser extent, a medium of exchange. Despite volatility and regulatory challenges, Bitcoin remains a foundational force in the global shift toward decentralized finance.