According to BlockBeats, data from Coinmarketcap indicates that the Altcoin Season Index is currently at 15, a decrease from its peak of 30 on June 11. This index reveals that over the past 90 days, 15 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 currently in a phase dominated by altcoins. It is based on the performance of the top 100 altcoins relative to Bitcoin over the last 90 days.