DeFi is a development in the cryptocurrency industry, aimed at recreating conventional banking services without centralized technologies. Bitcoin itself is a prototypical illustration of DeFi; the majority of other cryptocurrencies depend on central organizers or issuers. DeFi is implemented via dApps, typically installed on either a blockchain such as Ethereum or a tangle such as IOTA.
Decentralization suggests that there is no single point of failure since similar records are kept across a peer-to-peer network throughout a plethora of computers. Since it's unregulated, it is also available to all regardless of their income or where they stay. And, while a payment processing firm or a bank can close an unseemly customer's account, blockchains are immune to surveillance.