Bitcoin's growing dominance in open interest is delaying the anticipated altcoin season, as highlighted by recent market data. Bitcoin's open interest has surged to 50%, while altcoins have experienced a notable decline, reflecting a withdrawal of speculative interest. The altcoin season index has plummeted from over 80 to 37, indicating Bitcoin's regained market control. Analysts suggest that a true altcoin season could emerge if Ethereum surpasses and maintains a price above $5,000, potentially driving the market cap towards $2 trillion.