According to current market dynamics and search results, May 2025 may be a crucial time window for altcoin season. Recently, after Bitcoin broke $100,000, its dominance plummeted from 65% to 63.89%, and funds began to flow into the altcoin market, with mainstream altcoins like Ethereum and Solana rising over 6% within 24 hours. CoinMarketCap data shows that the altcoin quarterly index jumped from 23 to 36 in just 4 days, breaking the 'Bitcoin season' threshold and entering a neutral range. Historical patterns indicate that altcoin season typically occurs when Bitcoin's price stabilizes or rises slowly, lasting 1-2 months. Combined with institutional fund inflows and a shift in market sentiment towards greed, the latter half of May may see a collective surge in altcoins. However, potential risks such as regulatory policies and Bitcoin volatility should be monitored.