$BTC Bitcoin (BTC) is a decentralized digital currency that operates without a central authority, relying instead on blockchain technology. Created in 2009 by the pseudonymous Satoshi Nakamoto, Bitcoin allows peer-to-peer transactions over a secure, public ledger. It is limited to 21 million coins, making it deflationary by design. Bitcoin is often seen as both a digital alternative to gold and a speculative investment. It has influenced the rise of thousands of cryptocurrencies and has spurred global discussions about finance, privacy, and regulation. Despite volatility, Bitcoin remains the most widely recognized and valuable cryptocurrency in the world today.