Compound, a leading DeFi lending protocol with over $40 million in loans outstanding is not "risk-free" according to Spankchain CEO, Ameen Soleimani. While the code has been audited by several reputable firms there is still some smart contract risk. It is also still a custodial system since funds can be drained if an attacker compromises the private keys of administrative accounts. Further, when you lend on Compound, you are not guaranteed to be able to withdraw your money since there is a chance all funds are currently locked in outstanding loans.