Bitcoin ETF holdings: US spot Bitcoin ETF net assets as a percentage of BTC market cap — how much of the network the funds hold, and whether that share is still rising. Daily since January 2024.
Left axis: BTC price (log). Right axis: US spot Bitcoin ETF net assets as % of BTC market cap (supply from the issuance schedule).
share = US spot Bitcoin ETF net assets / (close × circulating supply)
Net assets are the combined holdings of the US spot Bitcoin ETFs at each day's close, from the same data as the ETF tracker. Market cap uses the daily close and the issuance-schedule supply, so the ratio is the share of all Bitcoin held through these funds.
A rising share means the funds are absorbing supply faster than the network issues it — the structural bid behind the 2024–25 advance. The 10% threshold marks a level at which the funds hold roughly a tenth of all coins; crossing it while flows are still positive would be an extreme of institutional concentration. A falling share with stable price means redemptions are being met by other buyers.
US spot Bitcoin ETFs held $149.2B, 9.10% of BTC market cap, as of Oct 16, 2026.
It shows the share of all Bitcoin held through the funds, independent of price. A rising share means the ETFs are absorbing supply faster than the network issues it; a falling share means redemptions are being met by other buyers.
At a tenth of the network held by a handful of funds, institutional concentration would be at an extreme, and previous cycles have topped when one category of buyer dominated the flow. The level is Coinfuty's own calibration, not a published standard.
Yes — net assets move with both flows and price, which is why the page shows the outflow streak alongside it.
Coinfuty computes every series on this page from daily BTC close prices and public constants — the Bitcoin halving schedule, block subsidy and published regression coefficients. Values refresh nightly (00:20 UTC) and the current day is patched hourly. These are historical, backward-looking indicators; nothing here is investment advice.