The Altcoin Season Index hit 12 in June 2025, marking a historic low and reinforcing Bitcoin’s grip on market dominance once again.
Bitcoin leads decisively as traders seek safety amid weak altcoin narratives, continuing a pattern seen every June since 2019.
Despite altcoin struggles, crypto market cap rebounds to $3.087T, reclaiming a key trendline and signaling strong market resilience.
As per Crypto analyst Michael van de Poppe on X, the Altcoin Season Index has crashed to a two-year low of 12, signaling a change toward Bitcoin dominance. This development confirms “Bitcoin Season” conditions, a period where Bitcoin outperforms most alternative cryptocurrencies. Historically, the index touched such lows in June each year since 2019. June 2025 follows this trend, adding weight to the cyclical pattern. Moreover, Bitcoin’s sustained strength casts a shadow over altcoin performance, limiting momentum across the broader ecosystem.
Source: Michael van de Poppe
Bitcoin Season Strengthens as Altcoins Falter
The Altcoin Season Index chart shows a pattern of alternating seasons since August 2019. Red zones represent Bitcoin Seasons, while blue zones reflect periods where altcoins outperformed. Bitcoin dominance surged during bear markets in 2019, 2020, and 2022. However, altcoins flourished during bull cycles, especially in late 2020 and throughout 2021. The current reading of 12 marks one of the lowest levels since inception, confirming that Bitcoin now leads the market decisively.
Additionally, the market’s focus has shifted back to Bitcoin amid uncertainty and fading altcoin narratives. This suggests traders prefer the perceived safety and liquidity of BTC. Furthermore, failed breakouts in major altcoins support this shift, reflecting investor hesitation.
Total Market Cap Reclaims Key Trendline
Despite weak altcoin performance, total crypto market capitalization is strong as per crypto analyst Moustache. His analysis shows a recovery from the 2022 bear market low of $800 billion. It now stands at $3.087 trillion after gaining $31.3 billion in a single day. Notably, the market has reclaimed and backtested a two-year ascending trendline, offering technical support.
Source: Moustache
Moreover, the chart features resistance zones. These levels previously acted as ceilings during the 2021 bull run. However, the current consolidation near all-time highs suggests resilience, not weakness.
Consequently, while Bitcoin outpaces altcoins, the crypto market expands. Altcoin underperformance, therefore, reflects relative positioning rather than fundamental collapse. Besides, historical data implies that deep Bitcoin dominance phases often precede altcoin rebounds.
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