Bitcoin Leads as Altseason Index Sinks to 19: 19 Top-100 Altcoins Outperform BTC Over 90 Days

As of December 7, CoinMarketCap data shows the Altseason Index at 19, signaling a modest tilt back toward Bitcoin as the benchmark within a volatile crypto backdrop. The gauge previously peaked at 78 on September 20, while last week’s average hovered around 25, underscoring uneven momentum across altcoins.

Over the prior 90 days, roughly 19 of the top 100 altcoins have outperformed Bitcoin on price, according to the index. This pattern points to selective leadership in the altcoin universe rather than a broad rally. The real-time indicator remains a useful tool for traders evaluating altcoin dispersion against BTC-driven dynamics and informs liquidity-aware investment decisions.