- CMC Altcoin Season Index falls to 32, which confirms that Bitcoin remains a market leader.
- Fewer than 35% of top altcoins outperform Bitcoin, keeping the index in Bitcoin Season.
- Bitcoin nears all-time highs, fueled by institutional demand and strong price momentum.
The CoinMarketCap (CMC) Altcoin Season Index stands at 32 out of 100 at press time, indicating that the market remains firmly in Bitcoin Season. This reading represents a decrease from yesterday’s value of 37, suggesting growing Bitcoin dominance.
Stablecoins and wrapped tokens are not included in the CMC Altcoin Season Index. It measures the 90-day performance of Bitcoin with that of the top 100 cryptocurrencies. At least 75% of these assets must beat Bitcoin for the market to enter Altcoin Season. Readings below 25 indicate Bitcoin Season, and readings above 75 signal Altcoin Season.
Over the recent weeks, the index has shown modest fluctuations. Last week, the reading stood at 24, while last month registered just 17, both solidly within Bitcoin Season parameters.
Historical data reveals a stark contrast to December 2024, when the index hit its yearly high of 87. This indicates a strong altcoin season. Conversely, April 26, 2025, marked the yearly low at just 12, which is peak Bitcoin dominance.
The readings show fewer than 35% of top altcoins are outpacing Bitcoin, placing the market squarely in Bitcoin Season despite the modest increase from previous months. The index slider visualization shows the market position leaning toward the Bitcoin side with minimal movement toward the neutral center.
Key factors driving Bitcoin dominance
Several factors continue to reinforce Bitcoin’s market leadership. With Bitcoin trading around $105,000, up 11% in the past week and 26% over the last month, altcoins face a challenging comparison benchmark.
Vincent Liu, Chief Investment Officer at quantitative trading firm Kronos Research, notes that Bitcoin remains in consolidation near its record highs. “Increasing adoption among institutional investors suggests BTC could be heading for a new all-time high,” Liu stated.
Related: Bitcoin Holds Above $103K, But Altcoins Start Fighting Back
Market analyst Rachael Lucas from BTC Markets points out that Bitcoin’s Relative Strength Index (RSI) has entered overbought territory. “In the short term, a pullback or sideways consolidation may be observed. A retest and consolidation above the key psychological level of $100,000 would be a healthy development and could provide a base for further upside,” Lucas added.
The Altcoin Season Index has become a key metric for traders timing rotation strategies between Bitcoin and altcoins. Historical patterns show altcoin seasons typically follow periods of Bitcoin strength, as profits from Bitcoin positions flow into higher-risk altcoin investments.
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