CoinMarketCap's Altcoin Season Index increased by five points to reach 48, indicating a shift in market dynamics. According to NS3.AI, the index measures whether 75% of the top 100 non-stablecoin and non-wrapped coins have surpassed Bitcoin's performance over the last 90 days. This rise suggests a growing trend in altcoin performance relative to Bitcoin, reflecting changes in investor sentiment and market behavior.