This article reviews the historical "alt-season" phenomenon in the cryptocurrency market, exploring the market's boom and bust across different cycles, including the first "alt-season" in 2012-2013, the ICO craze of 2017, and the rise of DeFi, NFTs, and meme coins in 2021. The author reminds investors of the extreme volatility and high risks in the market, emphasizing the importance of taking profits, risk management, and focusing on long-term investments.