Altcoin Accumulation Surges, Is This the Beginning of Altseason?

Crypto News - Posted on 17 September 2025 Reading time 5 minutes

Altcoin Accumulation Trend Strengthens, Is Altseason Beginning to Emerge?

Altcoin accumulation activity recorded a sharp increase in today’s trading session, raising a new question among investors: is the altseason phase—a period when altcoins outperform Bitcoin’s performance—starting to take shape?

 

The latest market data shows positive movement across altcoin indicators. The Altcoin Season Index reportedly climbed to 68, its highest level since last December. Meanwhile, the altcoin market capitalization has added more than US$130 billion in the past 24 hours. Major cryptocurrencies such as Ethereum (ETH), Tron (TRX), and SEI have drawn attention with notable price gains.

 

In addition, the activity of “whales” or large holders has also been significant, particularly in Ethereum. Several addresses that had previously shown little buying activity have resumed accumulating ETH in large quantities. This condition is considered a sign of medium- to long-term confidence from both institutional investors and high-net-worth individuals.

 

Analysts’ View

Although the market has not yet reached the peak phase of altseason—which is typically marked by altcoins consistently outperforming Bitcoin for 90 days across the majority of the top 50 cryptocurrencies—some analysts believe the signals that have emerged are strong enough to build market optimism.

 

Reports from Blockchain Center and CoinGlass note that the Altcoin Season Index has reached 76 out of 100, the highest level in recent months. While this figure has not yet officially surpassed the threshold of a full altseason (usually above 75–80), the movement toward this level is seen as an early indication of a shift in momentum.

Moreover, Bitcoin dominance has also begun to decline. This trend often serves as a trigger for capital rotation from Bitcoin into altcoins, which are perceived to offer greater growth potential, as observed in previous crypto cycles.

 

Heading Toward Altseason?

Based on the latest developments, several indicators suggest that the altcoin market is entering a preparatory phase toward altseason. The rise in the Altcoin Index, significant capital inflows, whale accumulation, and the decline in Bitcoin dominance all serve as strong signals of a structural shift in the market.

However, certain notes of caution remain:

  • Not all major altcoins have shown consistent outperformance against Bitcoin over the past 90 days.

  • Trading activity in smaller-cap altcoins remains vulnerable to volatility and manipulation.

  • External factors such as central bank policies, interest rates, and global regulations could still influence the direction of the market.

 

Given these conditions, although altseason cannot yet be confirmed as having officially begun, today’s emerging trend signals that the altcoin market is moving in that direction. Investors are advised to closely monitor the movement of specific assets, weigh the risks, and prepare strategies in case the momentum of strengthening continues.

 

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