CoinMarketCap's Altcoin Season Index has decreased by four points, reaching a level of 45. According to NS3.AI, the index measures the performance of altcoins relative to Bitcoin, defining an altcoin season as a period when 75% of the top 100 cryptocurrencies outperform Bitcoin over the previous 90 days. This decline indicates that fewer altcoins are surpassing Bitcoin's performance, suggesting a shift in market dynamics.

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