$BTC Bitcoin ($BTC) is the first and most well-known cryptocurrency, created in 2009 by the pseudonymous Satoshi Nakamoto. Built on blockchain technology, Bitcoin introduced a decentralized system where transactions are recorded transparently and securely without the need for intermediaries like banks. Often called "digital gold," Bitcoin serves as both a store of value and a medium of exchange. Its limited supply of 21 million coins drives scarcity, contributing to its value over time. Bitcoin has influenced the development of thousands of other cryptocurrencies and continues to be a dominant force in the financial and technological landscape worldwide.