This article explores stablecoins, covering their concepts, types, and investment strategies. It examines the main categories of stablecoins—fiat-collateralized, crypto-collateralized, algorithmic, and commodity-collateralized—and analyzes various investment approaches, from liquidity mining to automated yield optimization and compound rewards. The article also addresses critical risk factors in stablecoin investment, including platform risks, interest rate fluctuations, and liquidity concerns. By offering specific risk prevention strategies and investment optimization techniques, it serves as a comprehensive guide for stablecoin market investors.