Has the Altcoin Season Begun? Here’s the Latest Status According to the Index

Altcoins are performing remarkably well in the cryptocurrency market compared to Bitcoin. According to CoinMarketCap (CMC) Altcoin Season Index, the index has reached the 75 level.

This means that 75% or more of the top 100 cryptocurrencies have outperformed Bitcoin over the past 90 days.

The latest historical data on the index were as follows:

• Yesterday's value: 77
• Last week: 72
• Last month: 43
• Annual peak: 87 (December 4, 2024)
• Annual bottom: 12 (April 26, 2025, Bitcoin Season)

These data reveal that altcoins regained strong momentum in the second half of the year.

According to the “Top 100 Highest Performing Cryptocurrencies of the 90 Days” chart shared by CMC, many altcoins have made high gains in the last three months.

• MYX topped the list with a 17,053.51 percent increase.
• It was followed by LM with 3,079.20 percent and ASTER with 1,268.01 percent.
• Coins such as PENGU, OXB, UMT, EMA, CFX also appeared in the top 10.

Bitcoin, on the other hand, only rose 1.67% during the same period, making it one of the most significant indicators supporting the definition of an altcoin season.

If at least 75% of the top 100 cryptocurrencies outperform Bitcoin over the past 90 days, this period is called “Altcoin Season.” This calculation excludes stablecoins like Tether (USDT) and DAI, and asset-backed tokens like WBTC, stETH, and cLINK.