HODL Waves

Bitcoin's whole supply split by how long each coin has sat still, drawn as coloured bands. Warm bands are recently moved coins; cool bands are coins untouched for years. Every point shown is real up to the date on the badge above the chart.

Thirteen bands stacked to 100%. Each band is the share of all bitcoin whose last movement falls inside one age range — under a day, under a week, under a month, and so on up to more than ten years.

Watch which bands grow. For example, the young warm bands swelling from 15% to 25% of supply over a few months means old coins are waking up and changing hands, which historically happens as long-time owners sell into a rally.

Cool bands thickening means coins are going quiet and staying put, which has filled the long flat stretches between cycles. It tells you who is holding and for how long, **never** which way the price goes.

In words: for each age range, take the bitcoin whose last movement falls inside it, divide by the total supply and show it as a percentage. The bands are stacked with the oldest coins at the base.

Every point on screen was counted by **our own Bitcoin node** — a full copy of the blockchain that we run ourselves — and the line runs up to the date on the badge **above** the chart. A day our node could not count is left as a gap; it is never filled in from another source.

Age is measured by the last movement on the blockchain, so coins traded inside an exchange **never** appear to move and stay in the older bands.

Counted by Safu's own Bitcoin node: every coin sorted into 13 age bands by the day it last moved, read from the chain. One point per day from 2009. Coins are counted as they sit on the chain, not grouped by owner. No outside metrics feed is involved.

Computed in-house from Safu's Bitcoin node · 13 age bands · 1 point/day since 2009 · recomputed daily