Bitcoin (BTC) is the world's first decentralized cryptocurrency, operating without intermediaries or a central bank. As Wikipedia explains, it is both a monetary unit and a peer-to-peer payment system. How it works: The Blockchain: All transactions are recorded on a secure, tamper-proof public ledger known as a blockchain. Mining: Computers worldwide (miners) validate transactions by solving complex mathematical equations—a process called Proof-of-Work. No financial institution controls the network. Programmed scarcity: The maximum supply of Bitcoin is strictly limited to 21 million units, theoretically protecting it against inflation. Volatility: Its value fluctuates significantly based on supply and demand in financial markets. If you wish, I can explain the following in more detail: How to buy and securely store Bitcoin; the principles of mining and the "halving"; and investment risks. Let me know what interests you most. Wikipedia: Bitcoin (abbreviated as ₿, BTC, or XBT; from the English "bit"—a binary information unit—and "coin") is a cryptocurrency... BTCDirect: Bitcoin (BTC) – everything you need to know. Bitcoin (BTC) is a decentralized digital currency introduced in 2009. It allows users to transfer value... Kraken: What is Bitcoin (BTC)? A complete guide – Kraken. How Bitcoin works.