Decentralised Finance — DeFi — is arguably the most transformative application of blockchain technology to emerge since Bitcoin itself. It represents a parallel financial system, running on smart contracts, that anyone in the world can access 24/7 without a bank account, credit score, or identification. Understanding DeFi is essential context for any serious digital asset investor.
DeFi vs Traditional Finance
| Feature | Traditional Finance | DeFi |
|---|---|---|
| Access | Bank account required, KYC, credit checks | Anyone with a crypto wallet |
| Operating Hours | Business hours, weekdays | 24/7/365 |
| Settlement Speed | Days to weeks | Seconds to minutes |
| Custody | Bank holds your funds | You hold your own funds |
| Transparency | Opaque internal systems | All rules are public smart contract code |
| Intermediaries | Banks, brokers, clearinghouses | Smart contracts (code) |
Core DeFi Concepts
Smart Contracts
Self-executing code that enforces agreement rules automatically. The foundation of all DeFi — no counterparty trust required.
Liquidity Pools
Shared reserves of token pairs that power DEX trading. Liquidity providers earn fees from every trade.
AMM (Auto Market Maker)
Algorithm that sets token prices based on the ratio of assets in a pool. Replaces traditional order books.
Collateralisation
Most DeFi loans are over-collateralised — you must deposit more value than you borrow. Eliminated credit risk.
Flash Loans
Uncollateralised loans that must be borrowed and repaid within the same transaction. Used for arbitrage and liquidations.
TVL (Total Value Locked)
The total value of assets deposited in a DeFi protocol. A key metric for protocol adoption and health.
Leading DeFi Protocols
Aave
LendingTVL: $10B+The leading decentralised lending protocol. Deposit to earn, borrow against collateral. Offers flash loans — uncollateralised loans repaid within one transaction block.
Chains: Ethereum, Polygon, Avalanche, others
Uniswap
DEX (Spot Trading)TVL: $5B+The pioneering automated market maker (AMM) DEX. Trade any ERC-20 token pair without order books — trades are settled against liquidity pools contributed by users.
Chains: Ethereum, L2s, multi-chain
Compound
LendingTVL: $3B+One of the first DeFi lending protocols. Similar to Aave. Notably the first protocol to distribute governance tokens to users — pioneering the "DeFi summer" of 2020.
Chains: Ethereum
Curve Finance
Stablecoin DEXTVL: $2B+Optimised for stablecoin and low-slippage swaps between similar assets. The backbone of much of DeFi's stablecoin liquidity. CRV tokenomics are highly influential.
Chains: Ethereum, multi-chain
MakerDAO
Stablecoin ProtocolTVL: $8B+Creates DAI, a decentralised stablecoin backed by crypto collateral. Users deposit collateral (ETH, wBTC, etc.) to mint DAI. One of DeFi's oldest and most battle-tested protocols.
Chains: Ethereum
Key DeFi Risks
Smart Contract Bugs
Code errors can be exploited by hackers. Hundreds of millions have been lost to DeFi hacks. Audits reduce but don't eliminate this risk.
Liquidation Risk
If your collateral value falls below the required ratio, your position is automatically liquidated — you lose your collateral.
Impermanent Loss
In liquidity pools, if the price ratio of your token pair changes, you may receive fewer tokens than if you had simply held them.
Rug Pulls
Development teams can drain liquidity pools if admin keys are not properly locked or renounced. Common in smaller, new protocols.
DeFi Exposure Without Complexity
Wealtii's index funds include Ethereum and other smart contract platforms that power DeFi — giving you exposure to the growth of the DeFi ecosystem without directly managing protocol risk. See our funds →
Frequently Asked Questions
What is DeFi?
A collection of financial services (lending, trading, borrowing, savings) built on blockchain smart contracts. DeFi operates without intermediaries — rules are enforced by code, and anyone with a crypto wallet can participate 24/7.
What are the risks of DeFi?
Smart contract bugs, liquidation risk, impermanent loss, rug pulls, and oracle manipulation are the primary DeFi risks. Use only audited, battle-tested protocols and understand each risk before committing funds.
Disclaimer: Educational content only. Digital assets are volatile. Wealtii is early-stage and NOT YET REGULATED in all jurisdictions.