The Altcoin Season Index, which tracks altcoins’ performance relative to Bitcoin over 90 days, reveals crucial insights into market dynamics. Two historical triggers often precede significant altcoin breakthroughs: a weakening Bitcoin price after an extended uptrend and periods of Bitcoin decline at cyclical lows. When the index sits in the green ‘Bitcoin Season’ zone, Bitcoin tends to outperform. However, these moments typically present opportunities for accumulating altcoins as they rarely last longer than three months. The index is showing signs of shifting from Bitcoin dominance, leading to a potential breakout. 2025’s June has already marked the beginning of an Altcoin Season with historical data suggesting this trend. Currently, 23% of altcoins are outperforming Bitcoin — indicating growing strength beneath the surface. 60 days into 2025, the Altcoin Season Index is rising out of indecision territory and aligning with a historical pattern that suggests June 2025 may be the catalyst for a significant altcoin rally.