Introduction
The CMC Altcoin Season Index is an important metric that provides insight into whether the cryptocurrency market is currently in an 'Altcoin Season' or 'Bitcoin Season.' It is based on the performance of the top 100 altcoins relative to Bitcoin over the last 90 days. If most altcoins outperform Bitcoin, we are in Altcoin Season. Conversely, if Bitcoin dominates, it is Bitcoin Season.
Key Points
Based on data from the image you provided (as of July 12, 2025), here are the key points: