What is Bitcoin, actually?

Bitcoin is a digital currency with no bank, company, or government running it. Instead, a public ledger called the blockchain records every transaction ever made, and thousands of independent computers around the world maintain identical copies, making the history effectively impossible to forge or rewrite. New bitcoins are issued as rewards to the computers doing that work, called mining, on a fixed schedule that stops forever at 21 million coins.

That hard cap is the core of the investment thesis, digital scarcity, and the core of the criticism, since a currency nobody prints also cannot respond to crises. In practice, Bitcoin today functions less like spending money and more like a volatile speculative asset, closer to digital gold than digital dollars.

Practical warnings: transactions are irreversible, lost passwords mean permanently lost coins, and the price has repeatedly dropped by more than half. Own it only with money you can watch do that calmly.