Learn the method

over21m is built around a simple idea: follow coin behavior, not headlines. All of the charts on this site come from a few core steps:

1. Run a full Bitcoin node and keep a local, queryable copy of the chain.
2. Track each UTXO from creation to spend, including its “age” when it moves.
3. Join each spend with its entry cost to calculate realized profit or loss.
4. Group coins into age bands (from fresh to ancient) and watch who moves when.

This page will eventually hold:

• How the data is structured (tables, age bands, realized PnL)
• How to read each chart and what it’s actually measuring
• Methodology notes so anyone can sanity-check or replicate the work

Later on this may become a “start here” guide for people who want to build their own analytics off a node.