According to BlockBeats, the Altcoin Season Index, as reported by Coinmarketcap, currently stands at 16, a significant drop from its peak of 78 on September 20. This index indicates that in the past 90 days, approximately 16 out of the top 100 cryptocurrencies by market capitalization have outperformed Bitcoin.
The CMC Altcoin Season Index is a real-time metric used to assess whether the cryptocurrency market is in a period dominated by altcoins. It is based on the performance of the top 100 altcoins relative to Bitcoin over the past 90 days.