$BTC $BTC Bitcoin, often abbreviated as BTC, is a decentralized digital currency, meaning it's not subject to government or financial institution control. Transactions are verified by a distributed network of computers using cryptography, ensuring security and transparency. Its limited supply of 21 million coins is a key feature, potentially driving value appreciation over time. However, Bitcoin's price volatility is a significant concern for investors. Its use cases extend beyond simple transactions; it's also used as a store of value, similar to gold, and increasingly in decentralized finance (DeFi) applications. While adoption continues to grow, regulatory uncertainty remains a challenge for widespread mainstream acceptance. Understanding the technology and inherent risks is crucial before investing in or using Bitcoin.