Altcoin Season Index at 17: Only 17 Top-100 Coins Have Outperformed Bitcoin, CoinMarketCap Data Show

COINOTAG News, on December 21, citing CoinMarketCap data, reports that the Altseason Index currently sits at 17. The record shows a spike on September 20 when the index briefly surged to 78, with the weekly average for the prior week near 21, signaling episodic altcoin strength before a pullback.

Over the last 90 days, roughly 17 projects among the top 100 cryptocurrencies by market cap have outperformed Bitcoin in price gains, underscoring selective altcoin resilience. The Altseason Index is a real-time indicator designed to gauge whether the market favors altcoins over Bitcoin, based on the performance of the top 100 altcoins relative to Bitcoin over the past 90 days.