币界网报道：The Altcoin Season Index has dropped to 18%, signaling a strong Bitcoin season as BTC dominance continues to rise. Historically, a reading below 25% indicates Bitcoin is outperforming altcoins, while above 75% suggests altcoin season. The index has steadily declined from 40% in early January, reflecting Bitcoin's growing market share amid ETF approvals and institutional interest. Analysts note this trend may persist until the next Bitcoin halving in April, after which capital could rotate into altcoins. Meanwhile, Ethereum remains the top altcoin by market cap, though its dominance has slightly decreased. The shift highlights changing investor preferences during different market cycles, with traders now favoring Bitcoin's relative stability over altcoin volatility. Market participants are closely watching for potential altcoin rallies post-halving, when historical patterns suggest smaller cryptocurrencies may see increased attention.