YFI is the native cryptocurrency of the decentralised finance (DeFi) platform Yearn Finance. YFI was designed to be a governance token, allowing holders to participate in the decision-making process for the platform. It has a maximum supply of 30,000 tokens, and its value is primarily derived from its utility as a governance token and the demand for its services. The platform aims to automate yield farming and make it accessible to a wider audience, and it also allows users to provide liquidity to various DeFi protocols to earn returns.