Bitcoin Dominance Break Raises Altcoin Season Hopes — But Analysts Urge Caution

Bitcoin’s market dominance has slipped below a critical threshold, and if the breakdown holds, it could pave the way for a sustained altcoin rally, according to Coinbase research head David Duong.

While Bitcoin (BTC) has remained relatively stable — down just over 3% from its mid-week high of $120,000 — leading altcoins have seen sharper declines in recent days, casting doubt on the near-term strength of the much-anticipated “altcoin season.”

Altcoins Lead the Decline

Among the top 10 cryptocurrencies, XRP, Dogecoin (DOGE), and Solana (SOL) were the hardest hit on Friday, each falling around 5% over the past 24 hours, per CoinDesk data. From Wednesday’s highs, XRP and DOGE have dropped approximately 18%, while SOL is down 12%. The CoinDesk 80 Index — tracking mid-cap altcoins outside the top 20 — has shed 10% from its weekly peak.

Ethereum’s ETH, meanwhile, held relatively firm, trading 4% below its recent high amid continued accumulation by crypto treasury-focused firms.

Speculation and Leverage Behind the Pullback

The sharp altcoin sell-off followed a period of aggressive capital rotation into smaller tokens — a hallmark of emerging altcoin seasons. However, Duong attributes this week’s retreat largely to excessive leverage in altcoin derivatives markets.

Coinbase’s report noted that the Altcoin Open-Interest Dominance — a ratio measuring open interest in altcoin derivatives relative to BTC — surged to 1.6, a level historically associated with market corrections. A drop in this ratio would signal a healthier leverage reset, but without it, “more shakeouts are expected,” Duong warned.

Altcoin Season Index Retreats

CoinGlass’ Altcoin Season Index — which gauges altcoin outperformance relative to Bitcoin on a 0–100 scale — fell to 41 on Friday, down from 59 earlier in the week. Monday’s reading was the highest since January, during the speculative wave tied to the U.S. presidential inauguration.

Despite the pullback, altcoins excluding stablecoins have nearly doubled in market cap since April — a sign of strong underlying momentum, Duong added.

Bitcoin Dominance Signals Turning Point

Key to confirming an extended altcoin season is Bitcoin’s dominance metric, which tracks BTC’s share of total crypto market capitalization. According to the report, BTC dominance has broken below its 200-day moving average for the first time since a brief dip in January — a level that historically precedes periods of altcoin outperformance, such as in 2021.

Still, Duong advised caution: “A sustained move below the 200-DMA could validate the altcoin season thesis, but prudent positioning calls for additional confirmation — ideally multiple daily closes beneath that level.”