$BTC Bitcoin (BTC) is a decentralized digital currency based on blockchain technology, launched in 2009 by a team under the pseudonym Satoshi Nakamoto. Its total supply is fixed at 21 million coins, and mining rewards decrease through a proof-of-work (PoW) mechanism, halving every four years to control inflation. Its core features include peer-to-peer transactions, no need for third-party intermediaries, public and immutable transaction records, and security ensured by cryptographic algorithms. As of June 2025, the price of Bitcoin surpassed $110,000, reaching an all-time high, primarily driven by the approval of U.S. spot ETFs, increased institutional investment, and global liquidity easing. As 'digital gold,' Bitcoin serves both as a store of value and a payment method, but faces challenges such as transaction fee volatility, regulatory policy differences, and technical scalability issues (e.g., low transactions per second). Its price cycle is strongly correlated with halving events, and it may further penetrate mainstream financial systems in the future.