This article provides a detailed analysis of the transformative role of stablecoins in the fintech sector, exploring how they are revolutionizing the movement of funds by offering low-cost cross-border transfers, instant settlements, and convenient access to global currencies. It also introduces major stablecoins in the market, such as USDT, USDC, DAI, First Digital USD, and PYUSD, and discusses the growth potential and use cases of stablecoins in cross-border payments, DeFi applications, and the global financial system.