HODL waves — current supply by age

Current snapshot of the chain's supply, bucketed by how long ago each UTXO was minted. Cool blues = young cohorts (recently created or churned); warm yellows / ambers = long-dormant supply. Backed by an indexer-maintained per-cohort table — single-digit-millisecond render at any chain size. The stacked-area-over-time version requires daily snapshots and will accrete naturally as the indexer keeps recording state.