If you deposit in these DeFi dapps, you will become lenders on the blockchain, then you will make money with whatever cryptocurrency you stake: Aave Protocol, a decentralized, open-source, and non-custodial money market protocol on Ethereum; dYdX, a decentralized trading platform for Ethereum-based assets; Compound, a money market protocol on Ethereum; Nuo Network, non-custodial way to lend, borrow, trade margin and swap cryptocurrency on blockchain; Fulcrum, a DeFi margin trading and lending dapp on Ethereum; Nexo, an instant cryptocurrency lending Ethereum dapp. Blockchain technology reduces the centralized agencies in between, and every service in DeFi dapps is decentralized. So you can simply stake to earn interest!