Decentralized finance, or DeFi, refers to financial services — lending, borrowing, trading, earning yield — built on public blockchains using smart contracts instead of banks or brokers.
Smart contracts do the work
A smart contract is self-executing code on a blockchain. In DeFi, contracts hold funds and enforce rules automatically, so users interact with software rather than a company. This enables new services but also concentrates risk in code.
The risks are real
Smart contracts can contain bugs, protocols can be exploited, and “high yield” often means high risk. There is usually no customer support and no refunds. DeFi is powerful and experimental at once.
Learn before you use
Understand what a protocol does, who audited it, and what could go wrong before committing funds. Our glossary defines the key terms.
Educational content, not financial advice. Crypto is volatile and you can lose money. Do your own research. Crypto Ruble Coins is a news and education publication — not an exchange, conversion, or off-ramp service.
Last updated 13 Jul 2026
The Crypto Ruble Coins editorial desk reports and edits human-written journalism on the money layer of crypto — CBDCs, stablecoins, and crypto priced in your currency. Independent. Not financial advice.