As of May 2025, clear signs of altcoin season in the crypto market are emerging. Bitcoin's dominance has decreased from 65% to 63.89%, indicating a shift in market dynamics. This change follows Bitcoin surpassing $100,000, marking the first such change since February 3rd. It has triggered a substantial rise in altcoins, with Ethereum increasing by nearly 13%. Solana (SOL), Dogecoin (DOGE), and Cardano (ADA) have each risen by 6%. The CoinMarketCap Altcoin Index has risen from 23 to 36, indicating increasing momentum toward altcoins. Historically, such changes signal the beginning of altcoin season, where alternative cryptocurrencies surpass Bitcoin. Investors are advised to monitor their portfolios and diversify into altcoins with strong fundamentals and innovative technologies.