Decentralized Finance (DeFi) is revolutionizing the financial sector by removing intermediaries and providing individuals with direct control and ownership of their assets. Based on blockchain technology, DeFi enables users to lend, borrow, trade, and earn interest on digital assets without the use of conventional banks or financial institutions. The technology has been widely embraced, providing individuals with financial freedom and access. But with growth come great challenges—first and foremost, in security. The DeFi arena has seen a series of high-profile hacks, revealing its vulnerabilities and fueling calls for regulation. This article delves into the basics of DeFi, some of the largest hacks, and how they have influenced financial regulations.