TLDR: The emergence of decentralized finance (DeFi), which involves offering financial services on the blockchain, has the potential to redefine the banking industry. DeFi aims to replace traditional financial intermediaries with smart contracts on the blockchain, thereby automating all financial services. The benefits of DeFi include reduced costs compared to traditional intermediaries and increased accessibility to financial services. However, there are also risks, such as the susceptibility of smart contracts to hacking and cyberattacks. Computer scientists can address these risks by conducting comprehensive testing and code audits. The future of DeFi is likely to involve a complementary relationship with centralized finance (CeFi), with individuals choosing whether to use DeFi or CeFi based on factors such as risk appetite, market conditions, and trust in the technology.