Bitcoin is the very first cryptocurrency. It is basically digital money that only exists on the internet. People like to call it “digital gold” or “internet cash.” Unlike the dollars or rupees sitting in the bank account or in the wallet, no government, no bank, and no big company controls Bitcoin. Nobody can just decide to print more of it whenever they feel like it.
It works on something called the blockchain. Think of the blockchain as one huge, shared Google Sheet (or notebook) that’s copied to thousands of computers all over the world. Everyone can look at it, but nobody can secretly change what is already written in it.
Bitcoins are generated through a process called mining. Thousands of powerful computers race to solve a super-hard puzzle to mine Bitcoin. The first one to crack it gets to add the next page to Bitcoin’s permanent blockchain and wins new Bitcoins as a prize (right now in 2026, that’s about 3.125 fresh Bitcoins per win, worth a lot depending on the price). Bitcoin has a strict limit built into its code—only 21 million Bitcoins can ever exist.
When Bitcoin is sent to another person, then thousands of independent computers (run by normal people) quickly check the blockchain. They make sure the sender really owns the Bitcoin. Once most agree the transaction is real, it is added to the blockchain, where it cannot be erased or faked.
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