$BTC Bitcoin ($BTC) is based on **blockchain technology**, with core principles that include:

1️⃣ **Decentralized Ledger**: All network nodes jointly maintain transaction records, which cannot be tampered with

2️⃣ **Proof of Work (PoW)**: Miners compete through computing power to validate transactions and earn BTC rewards (6.25 coins per block, as of 2024)

3️⃣ **Fixed Supply**: A total of 21 million coins, with inflation controlled by halving every 4 years, the next halving is expected in 2028

4️⃣ **Cryptographic Security**: SHA-256 algorithm ensures transactions are irreversible, and private keys uniquely control assets

Its value derives from scarcity, decentralization, and global consensus, while its price is influenced by supply and demand, regulation, and market sentiment.