Altcoin Season Index Indicates Momentum Shift Beyond Bitcoin

The Altcoin Season Index from CoinGlass has risen to 58, relying on the surge of June 4th; this event signals that a rotation of capital from Bitcoin to a broader market of altcoins may have begun.

According to Mihan Blockchain, this index examines how many of the top cryptocurrencies (based on market capitalization) have outperformed Bitcoin over the past 90 days. The CoinGlass index assigns a score between 0 and 100 to the market, with a score above 75 indicating an official confirmation of altcoin season.

The current score of 58 in the CoinGlass altcoin index is well above the neutral point, but it is not strong enough to undermine Bitcoin's dominance in the market, which, according to CoinGecko data, stands at 57%. Since the surge above 60 on June 4th, this index has remained at elevated levels.

Determining the exact timing of altcoin season is not a precise science; the CoinMarketCap version of this index tells a similar but more cautious story. The CoinMarketCap platform evaluates a similar basket of coins and currently sits at a more neutral number of 53. The discrepancy between these two trackers is not unusual, as each provider weighs the basket of coins and determines their review timeframe slightly differently.

Bitcoin's own price action also supports the capital rotation scenario. Bitcoin's dominance has been testing key support levels in recent weeks. Some traders view a break of these levels as the catalyst that altcoin season needs.

The rise of this index aligns with a broader change in market structure. According to CryptoRank data, Bitcoin's dominance fell from 58.12% to around 54% in early July (the same source reports Bitcoin's current dominance at 56.3%). During this timeframe, the combined market share of altcoins (excluding Bitcoin, Ethereum, and stablecoins) increased from 19.39% to 24.68%.

Bitcoin's dominance remains strong, but signs of volatility are emerging alongside the awakening of altcoins. However, not all recent signals point to the organic strength of altcoins. In late June, Glassnode reported that its proprietary signal had returned to the altcoin season range. However, the company warned that the sharp decline in Bitcoin's price was the main driver of this movement, not the better and real performance of altcoins.

So far, the capital rotation seems more selective than broad. Capital has primarily concentrated in yield-bearing tokens and the Solana ecosystem, while selling pressure in large parts of the altcoin market with lower market caps is increasing.

Meanwhile, institutional capital flows tell a more constructive story. In mid-June, capital flows from exchange-traded funds (ETFs) shifted towards altcoins, with new money entering investment products for Ether, Solana, and XRP; this occurred precisely when Bitcoin funds were witnessing capital outflows. This pattern typically serves as a backdrop for a broader strengthening of altcoins, rather than directly confirming it.

The gap between the rising index and the weakening speculative appetite is significant. This is why most analysts describe the current movement as a rotation that is gaining strength, rather than a confirmed altcoin season.

Currently, this scenario relies more on the overall path and trend rather than definitive confirmation. The rise of the CoinGlass index towards 58, along with Bitcoin's price action losing some of its control over the total market share, provides tangible data for the capital rotation thesis. Whether this trend will continue towards the threshold of 75 likely depends on whether Bitcoin's dominance continues its downward trend throughout July.