DeFi (Decentralized Finance) is an open financial system that runs on a blockchain using smart contracts, letting people lend, borrow, trade, and save without banks or other traditional institutions. This guide explains it.
How it works
DeFi uses smart contracts — self-executing agreements on a blockchain — to carry out financial activity like lending and trading without a bank or traditional institution in the middle [1]. It is typically transparent and "permissionless": anyone with a wallet can take part from anywhere in the world.
DeFi vs traditional finance
The two systems differ in who sits in the middle. Traditional finance routes lending, trading, and saving through a bank or a similar institution, which decides who gets access, works to its own schedule, and holds the assets. DeFi gives that role to a smart contract: it executes whenever a wallet calls it, custody stays with the wallet holder, and the record sits on a public blockchain that anyone can read.
Opportunities and risks
DeFi lets holders do complex financial operations — saving, lending, insurance — without an institution taking a cut [1]. But it carries risks too: smart contracts can have bugs, prices are volatile, and regulation is still evolving [2]. Understand the risks before taking part.
The bottom line
DeFi is an open financial system that runs on a blockchain and replaces traditional intermediaries with smart contracts. It brings openness and transparency, but also new risks. Understanding it is the first step to reading on-chain finance. To keep learning the fundamentals, follow more from Bitbase Academy.
Related reading
Other Bitbase articles on this topic:
Disclaimer: This article is educational content from Bitbase Academy, provided for information only. It does not constitute investment, trading, tax, or financial advice. Crypto assets are volatile; assess your own risk. Written as of June 2026; refer to the latest official information.
References
[1] Stripe, "Understanding Decentralized Finance (DeFi)." stripe.com
[2] Federal Reserve Bank of Boston, "Decentralized Finance (DeFi): Transformative Potential & Associated Risks." bostonfed.org
