Coinbase Says Altcoin Season Nears as Market Cap Jumps 50%

Coinbase warned that a full altcoin season could be nearing, citing surging institutional interest in Ethereum (ETH) and improving liquidity conditions. The exchange said altcoin market capitalization has risen over 50% since early July, with the rally fueled by ETH’s rebound and favorable regulatory signals.

Data from TradingView showed altcoin market cap approaching $1.4 trillion, levels last seen during prior cycle peaks. Coinbase noted that Lido (LDO) has been among the top beneficiaries, gaining from Ethereum’s strength and U.S. Securities and Exchange Commission (SEC) clarity.

ETH Momentum and Market Structure Shifts

The Coinbase Institutional Monthly Outlook pointed to a divergence between the Altcoin Season Index and total altcoin market cap, suggesting rising ETH-led inflows from institutional desks. “Institutional interest in ETH is driving Altcoin Season,” the firm wrote, highlighting digital asset treasuries (DATs) and stablecoin narratives as key themes.

CoinMarketCap’s Altcoin Season Index, which triggers when 75% of the top 50 altcoins outperform Bitcoin over 90 days, currently stands at 40%. Coinbase suggested that a liquidity wave in late Q3 or early Q4 2025 could accelerate capital rotation from Bitcoin to altcoins.

After six months of declining liquidity, the exchange said conditions were improving. Trading volumes, orderbook depth, and net stablecoin issuance have all increased, supported by clearer regulation around stablecoins.

Analysts Outline Altcoin Season Playbook

Trader VirtualBacon described the current market as being in the “large-cap stage” of altseason, where majors like ETH, XRP, and Solana (SOL) lead gains before mid- and small-cap tokens follow.

“Large caps run first in altseason,” he said, adding that laggards almost always catch up. His strategy focuses on rotating profits down the market-cap ladder once leaders hit targets, avoiding overtrading and chasing momentum.

VirtualBacon’s positions include ETH with a $3,350–$4,850 range, XRP targeting $2.73–$4.48, and SOL aiming for $155–$260. Large-cap laggards like Chainlink (LINK), Cardano (ADA), Dogecoin (DOGE), and Stellar (XLM) were also on his radar.

Macro Catalysts and Institutional Flows

Coinbase’s report linked the potential September Federal Reserve rate cut to stronger retail inflows, noting that lower borrowing costs could enhance speculative demand. Institutional positioning has also intensified, with BlackRock reportedly holding $15 billion in ETH.

CryptoGoos, another market commentator, argued that the combination of ETH nearing its all-time high, SEC readiness to approve altcoin exchange-traded funds (ETFs), and Google searches for “altcoins” hitting records could create one of the biggest altseasons yet.

He cited the ETH/BTC ratio’s rally as resembling previous altcoin cycle accelerations, alongside total crypto market cap setting a new all-time high.

Market Data Underscores Altcoin Season Momentum

Wu Blockchain shared chart data from CoinAlayze and TradingView showing the altcoin open interest dominance ratio climbing toward levels last reached in early 2024. The metric measures the dollar value of open altcoin contracts relative to Bitcoin derivatives.

This open interest growth, paired with a sharp rise in market cap, has historically coincided with broad-based altcoin rallies. Coinbase added that regulatory advancements in the third quarter could further boost institutional appetite.

Outlook Heading Into Q4

Coinbase’s analysis stopped short of calling an immediate altseason but emphasized the alignment of multiple bullish drivers. These include ETH’s role as a market leader, improving liquidity, potential monetary easing, and favorable regulatory developments.

For traders, the rotation strategy remains central. As VirtualBacon noted, “Avoid FOMO, respect money flow, rotate down the ladder, and don’t overtrade.”

If conditions hold, large caps could continue to lead into September before momentum spreads to mid- and small-cap tokens. The window, analysts warned, might last only one to two months, making execution critical.