The recent spike of the Altcoin Season Index to 75 confirms the start of altseason, where the majority of altcoins are outperforming Bitcoin.
Altcoin Season Index
On August 22, 2025, the Altcoin Season Index reached 75, indicating that 75% of the top 100 altcoins (excluding stablecoins and wrapped tokens) have outperformed Bitcoin over the past 90 days. This level, per CoinMarketCap’s methodology, officially declares the start of 'Altcoin Season.'
Growth of Altcoin Market
Bitcoin's dominance has fallen to 58.5%, contributing to a 30% increase in altcoin market cap, totaling $1.8 trillion. Ethereum (ETH) saw $3.8 billion in institutional inflows, while Solana (SOL) displayed a 112% increase year-to-date.
Market Remains Volatile
Despite the positive market sentiment, experts advise caution. Volatility remains high, especially among small caps. Traders plan to take profits if the index hits 80-90, emphasizing the importance of disciplined strategies.
As September approaches, the crypto community is abuzz with anticipation. The index at 75 signals building momentum, which could lead to significant market changes.
