The Altcoin Season Index from CoinMarketCap has decreased by two points to 30, highlighting a decline in altcoin performance relative to Bitcoin. According to NS3.AI, this index evaluates the performance of the top 100 cryptocurrencies, excluding stablecoins and wrapped tokens, over the last 90 days. A reading below 75 suggests that Bitcoin is outperforming most altcoins, indicating a Bitcoin season rather than an altcoin season.