From beginner to advanced — master exchanges, wallets and blockchain essentials
Bitcoin’s supply limit is 21 million BTC. This guide explains how that cap works, why it matters, and what people often get wrong about it.
Bitcoin has no fixed market cap ceiling. Its fixed cap is the 21 million coin supply limit, while market cap changes with price.
Bitcoin can only reach 21 million coins because its protocol sets a hard supply cap and cuts new issuance over time through halving.
Why are there only 21 million bitcoins? Because Bitcoin’s supply cap is built into its issuance rules, with new BTC shrinking over time.
