Ethereum is a well-known decentralized open-source blockchain known for being the number one rival for Bitcoin. However, Ethereum is not exactly a direct competition to Bitcoin, as this protocol has different goals, applications, features, and crucial differences to its technology. Ethereum is more than just an investment instrument.
The goal of DeFi is to get rid of third parties that are involved in all financial transactions. It leverages the power of cryptography, decentralisation & blockchain to build a new financial system.