$BTC Bitcoin (BTC) is a decentralized digital currency invented in 2008 by an unknown person or group using the name Satoshi Nakamoto. It operates without a central authority, relying on blockchain technology to record transactions across a distributed network of computers. Bitcoin is limited to 21 million coins, making it scarce and often referred to as "digital gold." It enables peer-to-peer transactions worldwide with low fees and high security. Bitcoin's price is highly volatile, influenced by market demand, regulation, and adoption. As both a store of value and a payment method, Bitcoin plays a key role in the cryptocurrency ecosystem.