On 15 September 2022, Ethereum completed the Merge, switching its consensus mechanism from proof-of-work to proof-of-stake and reducing the network’s energy consumption by 99.95%. Within 18 months, the total value locked in decentralised finance protocols built on Ethereum exceeded $50 billion. The technical upgrade removed a barrier that had kept institutional participants away from decentralised systems. The global blockchain market, which underpins most decentralised financial technology, reached an estimated $31.18 billion in 2025, according to Fortune Business Insights, with the banking, financial services, and insurance sector representing 23.52% of total market revenue.
What “Decentralised” Means in Financial Services
Decentralisation in finance refers to systems where control is distributed across multiple participants rather than concentrated in a single institution. A traditional bank holds customer deposits, processes transactions, and makes lending decisions from a central authority. A decentralised system distributes these functions across a network of participants governed by code rather than a board of directors.
The distinction matters because it changes who bears risk, who earns fees, and who sets the rules. In a centralised system, the bank earns the spread between deposit rates and lending rates. In a decentralised lending protocol like Aave, depositors earn interest directly from borrowers, with the protocol taking a small fee. There is no bank in the middle.
Market analysis from Grand View Research projects that technology-driven market segments will continue expanding at compound annual growth rates between 15 and 25 percent through the end of the decade.
According to Deloitte’s industry outlook, more than 60 percent of large enterprises now allocate dedicated budgets to digital transformation initiatives, up from 35 percent in 2020.
This is not a theoretical difference. Aave held over $12 billion in total value locked by late 2024. Uniswap, a decentralised exchange, processed over $1.5 trillion in cumulative trading volume. MakerDAO, which manages the DAI stablecoin, allocated over $1 billion to real-world asset vaults. These are not experiments. They are functioning financial systems operating without traditional intermediaries.
The broader context: 83% of financial institutions are exploring or deploying blockchain-based solutions, according to Coinlaw. Decentralised technologies are not replacing banks. They are creating parallel infrastructure that banks are increasingly integrating into their own operations.
Decentralised Lending and Borrowing
Decentralised lending protocols allow anyone with cryptocurrency collateral to borrow without a credit check, bank account, or application process. The borrower deposits collateral (typically Ethereum or stablecoins) into a smart contract and receives a loan denominated in a different asset. If the collateral value drops below a specified threshold, the smart contract automatically liquidates enough collateral to repay the loan.
Aave is the largest protocol in this category. It supports lending and borrowing across dozens of assets on multiple blockchains including Ethereum, Polygon, Arbitrum, and Avalanche. Interest rates are set algorithmically based on supply and demand: when demand for borrowing USDC increases, the interest rate rises to attract more depositors. When demand falls, rates drop. This mechanism replaces the committees and pricing models that banks use to set rates.
Compound, the second-largest lending protocol, operates on a similar model with approximately $3 billion in total value locked. Both protocols have functioned through multiple market cycles, including the 2022 downturn that saw Luna collapse and FTX file for bankruptcy. The protocols continued operating because their logic is encoded in smart contracts that execute regardless of market conditions.
The limitation of current decentralised lending is overcollateralisation. Most protocols require borrowers to deposit 150% to 200% of the loan value as collateral. This makes them useful for leveraged trading and capital-efficient treasury management but impractical for the types of undercollateralised lending (mortgages, business loans, credit cards) that make up most of traditional banking. Protocols like Goldfinch and Centrifuge are working to bridge this gap by introducing real-world credit assessment into decentralised lending.
Decentralised Exchanges and Market Making
Decentralised exchanges (DEXs) allow users to trade tokens directly with each other through automated market makers (AMMs) rather than through a centralised order book. Uniswap, the largest DEX, uses liquidity pools: users deposit pairs of tokens into a smart contract, and traders swap against those pools. The price is determined by a mathematical formula (the constant product formula) rather than by matching buy and sell orders.
This model eliminated the need for the infrastructure that traditional exchanges require: matching engines, clearinghouses, settlement systems, and custodians. A trade on Uniswap settles atomically, meaning the exchange of assets happens in a single transaction. There is no settlement delay, no counterparty risk, and no custodian holding assets between trade and delivery.
The tradeoff is efficiency. AMMs are less capital-efficient than order book exchanges for large trades, resulting in price slippage. Concentrated liquidity, introduced by Uniswap V3 in 2021, partially addresses this by allowing liquidity providers to allocate capital within specific price ranges. Professional market makers now provide liquidity on DEXs alongside retail participants.
By late 2024, DEXs handled approximately 15% to 20% of total cryptocurrency spot trading volume. The percentage has grown steadily since the FTX collapse in November 2022, which demonstrated the counterparty risk inherent in centralised exchanges and drove traders toward decentralised alternatives.
Decentralised Insurance and Risk Management
Insurance is another financial service being restructured by decentralised technology. Nexus Mutual, the largest decentralised insurance protocol, allows members to buy coverage against smart contract failures, exchange hacks, and protocol exploits. Cover is priced by token-staking members who assess risk and back policies with their own capital.
The model is closer to mutual insurance (where policyholders are also owners) than to traditional insurance (where a corporation underwrites policies for profit). Claims are adjudicated by a decentralised vote among members, not by an adjustor employed by the insurer. Nexus Mutual has paid out over $17 million in claims since launch, including significant payouts following the 2022 Terra/Luna collapse.
Etherisc is building decentralised parametric insurance, where payouts are triggered automatically by verifiable events rather than by claims processes. Crop insurance, for example, can pay out automatically when weather data from an oracle (a service that feeds external data to a blockchain) confirms that rainfall in a specific region fell below a threshold. This model removes the claims process entirely, reducing costs and eliminating disputes about whether a covered event occurred.
The insurance applications of decentralised technology are still early-stage compared to lending and trading. But they illustrate the broader principle: any financial service that relies on intermediaries to assess risk, process claims, or hold reserves can potentially be restructured as a decentralised protocol governed by transparent, auditable code.
How Traditional Institutions Are Responding
Banks and asset managers are not ignoring decentralised technology. They are selectively adopting elements of it while maintaining centralised control over customer relationships, compliance, and risk management.
JPMorgan’s Onyx platform uses private blockchain technology for institutional settlement. The system processes over $1 billion in daily repo trading volume with blockchain-based settlement finality. But it is permissioned: only approved counterparties can participate. The technology is decentralised in architecture but centralised in governance.
BlackRock launched BUIDL, a tokenised money market fund on Ethereum, in March 2024. The fund uses blockchain for share issuance and transfer but maintains traditional fund administration, custodianship (through BNY Mellon), and regulatory compliance. It is a hybrid: decentralised rails with centralised oversight.
This hybrid model is likely where most institutional adoption will land. Pure decentralisation, where code alone governs financial transactions with no human override, creates regulatory challenges that most institutions cannot accept. But the efficiency gains of decentralised settlement, automated compliance, and programmable assets are too significant to ignore.
Blockchain-based cross-border payments already process $3 trillion annually, growing at 45% per year, according to Coinlaw. North America holds 43.80% of the global blockchain market, per Fortune Business Insights. The financial institutions in that market are building products that use decentralised technology under centralised governance. The result is a financial system that looks familiar from the outside but operates on fundamentally different infrastructure underneath.
