The Altcoin Season Index, as reported by CoinMarketCap, has seen a slight increase to 36, indicating a relative strength of altcoins compared to Bitcoin. According to NS3. AI, this index measures the performance of the top 100 cryptocurrencies against Bitcoin over the past 90 days. A score of 75 or above is indicative of an altcoin season, whereas lower scores suggest Bitcoin's dominance in the market