How often is Bitcoin actually overheated?
Far less often than the mood suggests. Across Bitcoin's full weekly history, the Accumulation Index has sat in its overheated band only a small share of the time — and in its cheaper half more than any other state.
HalvingLens Research · Published 18 July 2026
It is easy to feel like Bitcoin is permanently expensive — every green candle brings another round of “this is a bubble.” The historical record of the Accumulation Index, HalvingLens's point-in-time, price-only read of how attractive conditions are versus history, tells a calmer story.
Reconstructed for every week since 2012 using only the data available at the time, the Index has spent the clear majority of Bitcoin's life in its cheaper-to-neutral range. The genuinely overheated band — the stretched end associated with late-cycle peaks — is where it has spent the least time of all.
The distribution below is the full weekly record, recomputed live. Read it as base rates: overheating is the exception, and it has never lasted long before conditions cooled again.
Point-in-time Accumulation Index, weekly, across every cycle. Cheapest band at the top.
714 weekly closes · 2012–2026 · recomputed live from source
Euphoria is rare and fleeting; most weeks have sat closer to the middle or cheaper end of Bitcoin's historical range. That is context for reading any single day's number — not a signal, and not a forecast.
- Weekly closes since 2012, reconstructed point-in-time. Observations overlap heavily and are highly autocorrelated — they are not independent samples.
- The Index is a price-only historical mapping (Mayer Multiple, 200-week average, drawdown from the running high). It is a description of range, not a valuation or a prediction.
- Bitcoin's whole record sits within one long secular uptrend; a different price path would redistribute these base rates.
Reference this note as HL-N001. Permanent URL: https://halvinglens.com/research/notes/hl-n001
HalvingLens Research is educational and historical in nature. It is not investment advice, not a prediction, and not a recommendation to buy or sell any asset. Figures describe how the historical record behaved, within the assumptions stated. Past behaviour is not a guide to future results.