The Altcoin Season Index fell to 33 on April 10, 2025, signaling Bitcoin’s dominance. The index, by CoinMarketCap, tracks the top 100 cryptos’ performance against Bitcoin over 90 days; a score of 75+ indicates an altcoin season. The current score signifies Bitcoin outperforming altcoins. The index uses daily price changes to determine the proportion of altcoins beating Bitcoin. Bitcoin’s dominance has stayed above 55%. Capital flow rotates within altcoins rather than from Bitcoin into altcoins. Realized volatility decreases across altcoins. Historically, low index phases precede altcoin accumulation. The index does not predict, but guides on trends.
A Stark Signal of Bitcoin’s Resurgent Dominance
