$BTC is the symbol used to represent Bitcoin, the first and most well-known cryptocurrency in the world. Created in 2009 by an individual or group under the pseudonym Satoshi Nakamoto, Bitcoin operates on a decentralized network based on blockchain technology, which allows for secure and transparent transactions without intermediaries. Its supply is limited to 21 million coins, which contributes to its value as "digital gold." Bitcoin is considered a volatile asset, used both as an investment and a medium of exchange. Its adoption has grown significantly, driving debates about regulation, sustainability, and the future of cryptocurrencies in the global economy.