$ETH Bitcoin (BTC) is a decentralized digital currency that enables peer-to-peer transactions without intermediaries. Created in 2009 by Satoshi Nakamoto, BTC uses cryptography for secure transactions and control. The total supply is capped at 21 million, making it a scarce asset. BTC is traded on online exchanges and stored in digital wallets. Its value fluctuates based on market demand and supply. Bitcoin has gained widespread recognition and acceptance, with many businesses and institutions investing in and using it.