What is Bitcoin's maximum supply?

Bitcoin

btc

Rank #1 by market cap

Bitcoin's maximum supply is 21,000,000 BTC, hard-capped in its protocol code — no more can ever be created. Here's the live picture:

Bitcoin ($BTC)

• Price: $76,829 · Market cap: $1.54T (rank #1)
• Circulating / total supply: 20,071,518 BTC — roughly 95.6% already mined
• 24h change: -0.3%
• Sentiment: 76% up-tilted

How the cap works: new BTC enters circulation via miner block rewards, which are cut in half roughly every four years ("halvings"). Each halving progressively slows issuance toward zero, so the final BTC won't be mined until around the year 2140. About 929,000 BTC remain to be issued.

A couple of nuances worth knowing:

• The 21M cap is a protocol rule, not enforced by a smart contract — it's enforced by consensus, which is why it's considered the strongest scarcity guarantee in crypto.
• Because ~5% is lost forever (lost keys, sent to burn addresses), the effective available supply is lower than 21M.

You can trade Bitcoin on any major exchange — for example Binance or Bybit, both global with basic KYC.

Not financial advice — just the data.