The altcoin market capitalization is only some proportion factors away from its all-time excessive. Many analysts imagine it could actually attain a a lot larger degree in September.
A number of causes point out that the altcoin season has entered its acceleration part, the place nearly any altcoin buy might convey revenue. What are these indicators? Beneath are the important thing observations and explanations.
1. Altcoin Buying and selling Quantity Share Surpasses ETH and Bitcoin
Analyst Maartunn just lately noticed that altcoin buying and selling quantity surged in September whereas BTC and ETH volumes declined. This uncommon sign confirms capital is flowing into altcoins.
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Knowledge from CryptoQuant additionally exhibits that in September, altcoin spot quantity share rose whereas ETH and BTC shares shrank. Particularly, altcoins accounted for 37.2%, whereas ETH and BTC made up 31.8% and 30.9%, respectively.
This shift typically indicators liquidity rotation from Bitcoin and large-cap cash to mid- and small-caps, confirming the acceleration of altseason.
“Altseason Hints? Ethereum spot quantity is down over the previous week, whereas altcoin quantity is up,” Maartunn said.
The decline in ETH’s quantity share matches the well-known capital rotation cycle. Capital usually begins with Bitcoin’s rally, flows into ETH, and accelerates right into a broad altcoin surge.
Maartunn added that 8 out of 10 indicators in CryptoQuant’s bull/bear rating are actually bearish for Bitcoin.
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In the meantime, Bitcoin dominance has dropped alongside BTC’s worth in September. With the altcoin market cap rising, this reinforces the view that capital favors altcoins.
2. Altcoin Season Index Hits 2025 Excessive
The second signal is the Altcoin Season Index (ASI) from Blockchain Middle, which hit 80 factors, its highest degree in 2025. This confirms the market is in altcoin season.
ASI measures the efficiency of the highest 50 cash (excluding stablecoins) towards Bitcoin over the previous 90 days. With 75% of cash outperforming BTC, the index exhibits that altcoins dominate.
Through the acceleration part, ASI can climb to 100 earlier than the cycle ends, just like earlier peaks. This displays a powerful desire for high-risk altcoin investments.
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Analyst Lau famous that the acceleration interval of altcoin season can final from 17 to 117 days.
“Traditionally, the common period of alt season is 17 days, with a document of 117 days. Now we simply have to attend and see how lengthy the brand new cycle will final,” Lau said.
3. TOTAL3 Varieties a Large Bullish Triangle
The third signal comes from technical evaluation. TOTAL3 (the overall altcoin market cap excluding BTC and ETH) has been forming a large bullish triangle over the previous 4 years and is now on the verge of a breakout.
Charts present that TOTAL3 is testing its all-time month-to-month highs, with rising quantity and worth urgent resistance. A breakout would formally mark a strong acceleration of altseason, just like 2019–2021 cycles.
Simon Dedic, founding father of MoonrockCapital, called this a very powerful structural sign proper now.
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“Think about calling for the highest whereas TOTAL3 is on the verge of breaking out of a 4-year wedge, being on monitor for the very best month-to-month shut in crypto historical past,” Simon Dedic said.
If TOTAL3 breaks above $1.16 trillion to set new highs, it can enhance investor confidence in altcoins. With no historic resistance ranges to reference, the rally’s ceiling will rely completely on retail traders’ FOMO momentum.
4. Exchanges Like Upbit, Coinbase, and Bithumb Ramp Up Listings
Rising liquidity in altcoins has fueled a wave of recent trade listings in September.
- Upbit has added nearly one token per day (LINEA, PUMP, HOLO, OPEN, WLD, FLOCK, RED) to keep up its 50.6% market share towards Bithumb (46%).
- Bithumb listed EUL, WLFI, LINEA, and PUMP.
- Coinbase listed KMNO, DOLO, LAYER, SPX, AWE, and WLFI.
These listings improve altcoin liquidity, entice hypothesis, and enhance buying and selling quantity. The suggestions loop between itemizing information and rising volumes accelerates the altcoin season even further.