According to BlockBeats, data from Coinmarketcap indicates that the Altcoin Season Index has decreased to 38, after reaching 55 on July 21. This index reveals that in the past 90 days, approximately 38 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 current cryptocurrency market is dominated by altcoins. It is based on the performance of the top 100 altcoins relative to Bitcoin over the last 90 days.