Bitcoin dominance hit 60%. The altcoin season math does not work yet.
The Altcoin Season Index is at 39. It needs 75 to flip green. Capital is not rotating.
CryptoVibe Desk · bitcoin-dominance · altcoin-season · market-structure
- →Bitcoin dominance reached 60% as of April 22, per CoinMarketCap, while the CMC Altcoin Season Index printed 39 out of 100.
- →The index only flips to altcoin season above 75, requiring 75% of the top 50 alts to beat BTC over 90 days; at 39, the rotation thesis is not supported by the data.
- →Watch the index for a move above 50 before end of May as the first real signal that capital is actually rotating out of BTC.
- Bitcoin dominance → The percentage of total crypto market cap held in Bitcoin, used as a gauge of whether capital is concentrating in BTC or spreading into other coins.
- Altcoin Season Index → A score from 0 to 100 that counts how many of the top 50 cryptocurrencies have beaten Bitcoin's return over the past 90 days; readings above 75 mark altcoin season.
Bitcoin dominance reached 60% as of April 22, per CoinMarketCap data. The CMC Altcoin Season Index sat at 39 out of 100 the same day.
The index counts how many of the top 50 altcoins have beaten BTC's return over the prior 90 days. Above 75 is altcoin season. Below 75 is Bitcoin season. At 39, roughly 20 of the top 50 have outperformed BTC over that window. The flip threshold is not a feeling; it is a count.
Rotation calls have been circulating for weeks. The index does not track sentiment. It tracks price. Capital needs to actually leave BTC and settle in altcoins across a full 90-day window before the number moves. A week of alt pumps does not register.
A 60% dominance reading is historically meaningful. The last sustained run above 60% was in 2023, before spot BTC ETF approvals pulled institutional inflows tightly into BTC-native products. The structural difference now: spot Bitcoin ETFs give institutional capital a clean, regulated vehicle to stay in BTC without touching altcoins at all. Dominance can hold higher for longer than prior cycles implied.
The rotation thesis assumes ETF money eventually spills over into alts. Over the 90 days ending April 22, it has not. The index at 39 is the tape's verdict on that thesis.
Some alts are moving. The index does not deny that. It just requires 75% of the top 50 moving together, over a 90-day window, faster than BTC. Individual outperformers do not move the aggregate. That gap between selective alt pumps and a genuine rotation is where traders keep getting caught.
The first checkpoint worth watching is index 50, not 75. A move from 39 to 50 would mean 25 of the top 50 alts sustaining outperformance against BTC over the full window. Below 50, the rotation thesis is still a hypothesis.
Any desk rotating capital into altcoins at an index reading of 39 is trading narrative over tape, and the tape currently says Bitcoin Season.
The Altcoin Season Index crossing 50 before end of May, which would require roughly 25 of the top 50 alts sustaining 90-day outperformance against BTC; if it stalls below 50, the rotation thesis has no data support this cycle.
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