Bitcoin (BTC) is the first and most well-known cryptocurrency, created in 2009 by an anonymous person or group using the pseudonym Satoshi Nakamoto. It operates on a decentralized, peer-to-peer network without a central authority like a bank or government. Bitcoin transactions are recorded on a public ledger called the blockchain, which ensures transparency and security.

Bitcoin has a fixed supply of 21 million coins, making it deflationary in nature. It is often referred to as "digital gold" because, like gold, it is scarce and can serve as a store of value. BTC is widely used for investment, online purchases, and as a hedge against inflation and traditional financial instability.

Its price is highly volatile, influenced by market demand, investor sentiment, regulations, and macroeconomic trends. Over the years, Bitcoin has grown from a niche experiment into a globally recognized financial asset, shaping the future of digital finance and blockchain technology.