BTC: Coin Days Destroyed — Trailing 90 Days

Bitcoin Coin Days Destroyed — Trailing 90 Days was 1,129,254,811.27 BTC-days on 7 Nov 2026 (latest daily value).

Bitcoin coin days destroyed over the last 90 days: for every bitcoin spent, its amount times the days it had sat unmoved, summed over 90 days.

Why use it. Old coins moving destroy many coin days, so the 90-day sum shows long-held bitcoin coming back into circulation. How to read it. Rising values mean older coins are being spent; falling values mean holders are sitting tight. It doesn't tell who spent the coins or whether they were sold.

Calculation. Exact definition: Header-time coin days destroyed summed over the trailing 90 adjacent UTC daily observations. This is a rolling sum, not a daily rate or an ending unspent-age stock. Repeatedly spending outputs creates separate observations; change and self-spends remain. The plotted day is included, and any missing day or incomplete warm-up leaves a gap. Read the window's partial/final label. Sum 90 daily CDD values from locally validated canonical block and undo facts, where each spent value is weighted by max(0, spend-header time − creation-header time) / 86,400. Pool BTC-days using the existing exact-decimal calculation; the weakest contributing daily finality is retained.