Decentralised finance protocols operate without intermediaries but expose users to significant technical and financial risks
While DeFi offers permissionless access to financial services, the absence of traditional safety nets means users bear full responsibility for security and asset management.
Decentralised finance, or DeFi, represents a fundamental shift in how financial services are delivered, operating on blockchain networks without the need for banks, brokerages or other intermediaries. Unlike traditional finance, which relies on gatekeepers to determine who can transact, DeFi protocols enforce terms through automated software known as smart contracts. This architecture allows users to lend, borrow, trade and stake assets directly via decentralised applications, provided they possess an internet connection and a compatible crypto wallet.
The technology underpinning this ecosystem relies heavily on self-custody wallets, where users hold their own private keys rather than entrusting assets to a third party. While this removes the reliance on corporate policies and credit checks, it also eliminates safety nets such as fraud departments or dispute resolution mechanisms found in regulated institutions. In this environment, the code functions as law; if a transaction is signed and sent to the wrong address, it cannot be reversed, and there is no one to call if funds are lost.
Layer 2 networks such as Base and Arbitrum have emerged to address the high costs and slower speeds of the Ethereum mainnet, currently handling more transactions than the primary network due to their efficiency. However, the ecosystem remains vulnerable to security incidents, including a notable 2026 exploit of the Kelp DAO bridge. This attack created a liquidity crisis on the Aave protocol, where attackers used the platform as an exit ramp for ill-gotten tokens, leaving lenders unable to withdraw their deposits.
Risks within the DeFi space extend beyond external hacks to include inherent mechanics such as impermanent loss, now often referred to as divergence loss. Liquidity providers in decentralised exchanges face the possibility that the value of their deposited assets will decrease relative to simply holding them due to price volatility. Furthermore, smart contracts are susceptible to bugs and design flaws that can be exploited by hackers, potentially draining protocol pools if vulnerabilities are discovered.
To mitigate these dangers, experts advise users to prioritise established protocols that have undergone rigorous third-party code audits and have survived previous market cycles. Beginners are encouraged to start with simple activities like lending before attempting more complex strategies like providing liquidity to automated market makers. Using smaller amounts of capital on lower-cost networks can serve as practical tuition, allowing users to understand the mechanics and potential perils without exposing significant wealth to immediate risk.
