$BTC Bitcoin (BTC) is the first and most well-known cryptocurrency, created in 2009 by an anonymous person or group known as Satoshi Nakamoto. It’s a decentralized digital currency that operates without a central bank or government. Instead, it uses blockchain technology—a public, tamper-proof ledger—to record all transactions.

Key features:

Limited Supply: Only 21 million BTC will ever exist, making it deflationary.

Decentralized: Secured by thousands of nodes worldwide.

Use Cases: Store of value (often called "digital gold"), peer-to-peer transactions, and a hedge against inflation.

Bitcoin's price can be volatile, but it's widely accepted and considered the foundation of the crypto ecosystem.