One of the most notable features of Decentralized Finance (DeFi) is the popularity of the concept of "yield". To attract users, new protocols are advertising ridiculously high numbers every day: 97% APR for these tokens, 69,420% APY for these tokens, etc. Of course, this feature of DeFi is also something that makes newcomers suspicious. How is it possible for a new protocol on a blockchain that you've never heard of to earn 1 billion percent when the typical savings account has an intere...