$BTC Bitcoin (BTC) is the first and most famous cryptocurrency, created in 2009 by an anonymous figure named Satoshi Nakamoto. BTC uses blockchain technology and is decentralized, meaning it is not controlled by any government or financial institution. Its supply is limited to 21 million coins, making it a rare asset. Bitcoin is often considered "digital gold" and is used as a hedge against inflation. The price of BTC is highly volatile, influenced by market demand, regulation, and global sentiment. By 2025, long-term price predictions indicate significant potential increases, though it remains accompanied by high risks for investors.