The Altcoin Season Index has increased to 28, as reported by Chainthink on November 8, 2025, using CoinMarketCap data. This rise indicates that 28 out of the top 100 cryptocurrencies by market capitalization have outperformed Bitcoin in the last 90 days. The CMC Altcoin Season Index is a real-time measure that assesses whether the cryptocurrency market is currently led by altcoins, based on their performance relative to Bitcoin over a three-month period.