BTC Supply Distribution by Cohort: 4.15M
How Bitcoin's supply splits between wallet sizes over time, from smallest to largest, stacked into one picture. Wallets are grouped into six size bands nicknamed shrimp up to humpback.
Six stacked bands, each showing the bitcoin held by addresses of one size: under 1 ₿ (shrimp), 1 to 10 (crab), 10 to 100 (fish), 100 to 1,000 (shark), 1,000 to 10,000 (whale) and 10,000 or more (humpback). Grouping wallets into size bands like this is what the word 'cohort' in the title means.
Watch which bands thicken. For example, the top two bands growing while the bottom two shrink means coins are concentrating in the biggest addresses; the reverse means coins are spreading out to ordinary owners.
Coins have to come from somewhere, so one band growing always means another is losing — that is coins physically moving between wallet sizes.
Each day **our own Bitcoin node** adds up the balances inside each size band and stacks the six of them. The bands together come to slightly less than the whole supply, because a small amount of bitcoin sits in outputs with no standard address.
This counts addresses, not people or companies: one exchange address can hold thousands of customers' coins, and one owner can spread coins across many addresses. Our node currently shows history from 2023 and fills in earlier years as it finishes recounting the blockchain from the first block.
Safu's own Bitcoin full-node UTXO index (chain replay from genesis).
Safu's own Bitcoin node · we show the history our node has finished loading (currently from 2023)