The cryptocurrency market shows signs of an imminent altcoin season in May two thousand twenty-five. Bitcoin's dominance has decreased to fifty-three point eight percent, indicating a rotation of capital toward altcoins. Ethereum has increased by three point five percent, reaching two thousand four hundred fifty dollars, while Solana rose by five point eight percent to one hundred forty-five dollars. The altcoin season index from CoinMarketCap indicates that more than seventy-five percent of the top altcoins have outperformed Bitcoin in the last ninety days. The increase in trading volumes and institutional interest supports this trend. However, caution is advised due to the inherent volatility of the altcoin market.