December 8, 2025By Coineras Team

Altcoin Season Index at 35 as Bitcoin Dominance Rises to 48%

Altcoin Season Index at 35 as Bitcoin Dominance Rises to 48%

Lead

The crypto market is signaling a Bitcoin-led phase as the Altcoin Season Index sits at 35, indicating it is not altcoin season. Bitcoin dominance stands at 48%, with 457 days elapsed since the last altcoin season compared to a 518-day historical average.

Key Developments

  • Altcoin Season Index: 35
  • Market status: "It is not Altcoin Season!"
  • Bitcoin dominance: 48%
  • Days since last altcoin season: 457
  • Average days between seasons: 518

Market Context

The Altcoin Season Index offers a snapshot of whether capital is favoring altcoins or Bitcoin by analyzing the relative performance of leading cryptocurrencies over a recent 90-day window. A reading in the mid-30s suggests that altcoins, on balance, have not been outperforming Bitcoin.

The accompanying performance chart for the top 50 cryptocurrencies over the last 90 days points to mixed returns across large- and mid-cap tokens, reinforcing the current Bitcoin-led trend. With Bitcoin dominance at 48%, liquidity and market attention appear concentrated in BTC, a common pattern during phases when altcoins lag.

Why It Matters

  • A lower Altcoin Season Index reading historically aligns with stronger relative performance from Bitcoin.
  • The 457-day gap since the last altcoin season versus the 518-day average provides a reference for cycle watchers, though timing can vary and past averages don’t guarantee future behavior.
  • A sustained climb in the index would indicate a broadening market where more altcoins begin to outperform Bitcoin over a multi-week to multi-month horizon.

What to Watch

  • Bitcoin price action and dominance: Continued strength can keep pressure on altcoin performance.
  • Market breadth: Improving performance across a larger share of top 50 coins would likely lift the index.
  • Liquidity and risk appetite: Shifts in market conditions and sentiment can catalyze rotation from BTC into altcoins.

Conclusion

Current readings underscore a Bitcoin-centric market with no confirmed altcoin season. Traders and investors are watching whether the Altcoin Season Index can rebound from the mid-30s and whether Bitcoin dominance retreats—signals that could foreshadow the next rotation into altcoins.

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