The Altcoin Season Index fell to 13 in June, the lowest level in two years, indicating that Bitcoin continues to significantly outperform the overwhelming majority of altcoins. The decline is part of a recurring mid-year seasonal pattern that has historically shown a shift in market dominance towards Bitcoin.
Index data measuring the performance of the 50 largest altcoins relative to Bitcoin confirms the current market sentiment of caution and 'flight to quality' in the digital asset space.
Bitcoin is gaining strength
The Altcoin Season Index published by BlockchainCenter measures the performance of the top 50 altcoins relative to Bitcoin over a 90-day window. A score below 25 indicates that less than 25% of altcoins outperform Bitcoin during this period, signaling that a 'Bitcoin Season' has begun.
This month, the index is only 12, deeply within Bitcoin Season. Traders often interpret a low Altcoin Season Index as a signal that Bitcoin is attracting more investor interest and liquidity. This reflects a strong capital shift towards Bitcoin, with most altcoins underperforming.
Data on the low performance of altcoins
Further analysis of recent performance data confirms that most leading cryptocurrencies have shown negative returns over the past 90 days. Bitcoin, on the other hand, has shown modest growth during the same period.
For context, Bitcoin has risen approximately 9.01%, climbing from $93,433 on April 24 to $101,853 at the time of publication. During this time, Bitcoin even set a new all-time high of $112,000, while most altcoins remain below their peaks.
Only a few altcoins have shown significant outperformance. Some, such as ENA, ETHFI, and STRK, have fallen by more than 40%. This imbalance amplifies the index readings and suggests that investor confidence is consolidating around Bitcoin as a more resilient asset in the current conditions.
Meanwhile, the latest data on the Altcoin Index indicates a recognizable market pattern: June is traditionally a weak month for altcoins.
Consistent model for June
Data shows that this metric has reached or approached similar lows in June of previous years, particularly in 2019, 2020, 2022, 2023, and 2024. In 2021, when sentiment towards altcoins was strong, the lowest value was observed in July.
Analyst Michael van de Poppe further emphasizes this seasonal pattern. He noted that every half-year period since 2019 has been characterized by a decisive swing in favor of Bitcoin. The recovery of altcoins at the end of the year often followed these declines, suggesting that a major rebound may not be far off.