Altcoin Season? Momentum Builds as Bitcoin Pauses Near Record Highs

Whether the altcoin rally continues hinges largely on Bitcoin’s next move—either holding steady above key support or pushing through to new highs.

Bitcoin recently surged to a new all-time high near $124,000 before encountering resistance as profit-taking kicked in. This explosive rally has set the stage for what many now call the return of “altcoin season”—a period where non-Bitcoin cryptocurrencies experience outsized gains.

Until now, the rally has been BTC-dominated, fueled by institutional inflows into spot bitcoin ETFs and corporate treasury allocations. Altcoins, by contrast, had been largely sidelined.

That narrative, however, may be shifting. This week, capital has begun rotating into more speculative assets, with several altcoins soaring between 50% and 80%. Ethereum led the charge with a 23.3% weekly gain, outperforming Bitcoin’s 9.3%. Layer-1 tokens such as SEI and SUI also posted impressive gains of 41% and 36%, respectively.

Signs of a True Altcoin Season?

Unlike the hype-driven altcoin booms of previous cycles—often sparked by influencers and celebrity endorsements—this emerging trend appears more selective. Coins tied to high-activity projects like SUI are leading the way.

Data backs the shift: CryptoQuant’s MVRV-based altcoin season indicator has signaled “altcoin season” for multiple weeks—something not seen since June 2024. MVRV, which compares market value relative to realized value, has historically remained in “alt season” territory for extended periods during bull runs.

Meme coin dominance, meanwhile, has declined sharply in 2025—undermined in part by poorly received meme coins tied to former President Donald Trump and First Lady Melania Trump. This retreat from pure speculation suggests a more fundamentals-driven market, favoring project-backed tokens over hype.

Further evidence comes from CoinDesk’s CD20 index—tracking a broader range of cryptocurrencies—which has outpaced the CD5 index (BTC, ETH, XRP, SOL, ADA). CoinMarketCap’s altcoin season barometer has also risen to 36/100, a level reached only once in the past 90 days.

What Comes Next?

Altcoins remain highly sensitive to Bitcoin’s price action. If BTC consolidates above the $112,000 support level, altcoins could continue their climb. But should Bitcoin either break below that floor—or resume its rally into new price territory—altcoins may underperform as capital shifts back to BTC.

That’s because altcoins still suffer from lower liquidity, making them more vulnerable to market whiplash and less attractive during aggressive BTC moves.

For now, momentum appears to be building. But as always in crypto, much depends on Bitcoin’s next step.