Altcoin vs Bitcoin: 3 Early Signals of Altcoin Season in September 2025

Jakarta, Pintu News – Bitcoin’s (BTC) dominance in the cryptocurrency market has shown a slight weakening in the past 24 hours, dropping by 0.06 points to 57.31%. While this may sound small, the change makes room for altcoins to start standing out.

According to CoinMarketCap’s Altcoin Season Index data, today’s score of 51 out of 100-just on the neutral line-suggests that altcoins are starting to gain a slight edge over Bitcoin, but not yet strong enough to declare a full altcoin season.

1. Altcoin Season Index and Bitcoin Dominance: A Tug of War

In the last 30 days, Bitcoin’s dominance fell from 61.25% to 57.31%, signaling a slight shift of funds to altcoins. Meanwhile, the Altcoin Season Index actually fell 5.56 points to 51/100, according to CoinMarketCap data-a number that is technically neutral, but indicates an initial boost from the altcoin market.

This shows that altcoins are starting to get more attention, but a massive capital shift from BTC to altcoins is yet to happen. Historically, the index value has to break 55 for it to be considered a signal of the beginning of a strong altcoin season.

Also Read: Can Ripple (XRP) Make Investors Millionaires? Here Are the Prospects According to Analysts!

2. Small Altcoin Surge: Trusta AI, XPIN, and Hemi in the Spotlight

Amid Bitcoin’s weekly decline of 4.29% and Ethereum’s (ETH) 6.6%, several niche altcoins recorded sharp jumps. Trusta AI jumped 136% after the launch of new ecosystem integrations, XPIN Network rose 29%, and Hemi skyrocketed 55% thanks to their newly secured IDR247 billion ($15 million) funding.

However, according to CoinMarketCap, this rally is still very much limited to small-cap tokens and has yet to spread to top-tier altcoins. This means that the surge has been driven more by retail speculation and individual project news than broad market sentiment.

3. Whale movement to Ethereum: Capital Rotation to Watch Out For

One notable signal came from the movement of a whale investor who converted 34,110 BTC worth IDR610 trillion ($3.7 billion) into 813,299 ETH within 11 days. This is one of the largest BTC to ETH shifts in 2025 so far.

Although Ethereum itself still recorded a worse weekly performance than BTC (-6.6% vs -4.29%), this move indicates a strategic positioning for a possible altcoin rally ahead. However, major investors still seem to be waiting for clearer macro triggers such as Fed rate cuts before getting aggressive again.

Early Signals Are There, But Not Enough for an “Altcoin Season”

Although some altcoins are starting to show strength relative to Bitcoin, BTC’s dominance is still structurally high. The surge in small altcoins and the whale move into ETH are early signals, but there hasn’t been the massive capital rotation that usually marks the beginning of a true altcoin season.

Keep an eye on the movement of the Altcoin Season Index – if it breaks 55, then the chances of an altcoin season will be even stronger. Until then, the market still favors selective plays on certain altcoins over an overall strategy.

Also Read: 4 Interesting Facts Why 1 in 4 Brits are Interested in Crypto Investment for Retirement Funds

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This content aims to enrich readers’ information. Pintu collects this information from various relevant sources and is not influenced by outside parties. Note that an asset’s past performance does not determine its projected future performance. Crypto trading activities are subject to high risk and volatility, always do your own research and use cold hard cash before investing. All activities of buying andselling Bitcoin and other crypto asset investments are the responsibility of the reader.

Reference:

• CoinMarketCap. Trending Coins and Altcoin Index. Accessed September 1, 2025.