$BTC Bitcoin is a decentralized digital currency, often referred to as a cryptocurrency, that was introduced in 2009 by an anonymous entity known as Satoshi Nakamoto. Unlike traditional currencies issued by governments, Bitcoin operates without a central authority or intermediary. It is based on blockchain technology, a distributed ledger system where transactions are recorded in a secure and transparent manner.

Bitcoin can be used for peer-to-peer transactions, online purchases, or as a store of value similar to digital gold. Its supply is limited to 21 million coins, which makes it scarce and potentially valuable over time. Bitcoin's price is highly volatile, influenced by factors such as demand, investor interest, regulation, and global economic conditions. While some see it as a revolutionary financial tool, others view it as a risky speculative asset. Regardless, Bitcoin has sparked widespread interest in blockchain technology and has inspired thousands of other cryptocurrencies.