CoinMarketCap's Altcoin Season Index currently stands at 37, indicating that the market is not experiencing an altcoin season. According to NS3.AI, this index measures the 90-day performance of the top 100 cryptocurrencies, excluding stablecoins and wrapped tokens, in comparison to Bitcoin. A value above 75 typically signals an altcoin season, where altcoins outperform Bitcoin. The current index suggests Bitcoin continues to dominate the market, with altcoins not showing significant gains relative to Bitcoin.