Output-set structure by cohort — Number of unspent outputs per age cohort — output-set structure and fragmentation, independent of coin amount
UTXO count by age examines the age structure of Bitcoin's unspent supply: Output-set structure by cohort. It shows whether coins are maturing in wallets or being returned to circulation.
The output-set structure by age — tracks fragmentation and dust dynamics rather than value. Diverges from supply bands when many small outputs churn.
Age bands are a lens on UTXOs, not on people. One holder can control many addresses, and a coin can move for reasons other than selling.