The promise of decentralized finance was once a clarion call for a democratic financial revolution. It envisioned a world where the rigid, exclusionary walls of traditional banking would be replaced by transparent, automated, permissionless systems. As we move through 2026, that early optimism has given way to a more sober reality.
While the technology remains powerful, the economic foundations of most DeFi lending protocols are still structurally weak. Much of the system operates on reflexivity, where value is borrowed from the future to support the present. Without a shift from internal speculation toward external utility, the ecosystem risks long-term irrelevance.
Recursive Lending Without Productive Output
At the core of the problem is the circular nature of DeFi lending. In traditional finance, loans fund productive activity that generates real economic output. In DeFi, lending is largely recursive. Users deposit volatile assets, borrow stablecoins, and often recycle them back into the same assets.
This creates leverage loops that function in bull markets but produce no real economic surplus. Yield is driven not by productivity, but by demand for leverage among speculators, making the system heavily dependent on rising asset prices.
Inflationary Tokens Attract Mercenary Liquidity
This fragility is reinforced by inflationary tokenomics. Many protocols rely on liquidity mining incentives paid in governance tokens to attract capital. This creates mercenary liquidity that constantly chases the highest yield.
These tokens often have limited real utility, meaning their value depends heavily on future buyers. When prices fall, yields collapse, liquidity exits, and protocols can spiral quickly. The collapse of Iron Finance in 2021 illustrated this dynamic clearly, as its partially collateralized stablecoin system broke down rapidly once confidence eroded.
Over-Collateralization Limits Real Access
Capital inefficiency is another structural flaw. Traditional banking extends credit based on trust and repayment history, while DeFi is overwhelmingly over-collateralized. Borrowers must lock up more value than they receive, often making the system unusable for those who actually need capital.
A small business in an emerging market cannot access DeFi credit if it requires holding 150% collateral in volatile crypto assets. As a result, the system favors capital-rich speculators rather than real economic participants.
Automated Liquidations Amplify Market Stress
Systemic risk is further amplified by liquidation cascades. Smart contracts automatically liquidate positions when collateral falls below thresholds. In volatile markets, these forced sales push prices lower, triggering further liquidations in a feedback loop.
The collapse of the Terra/Luna ecosystem in 2022 showed how quickly this can escalate. Anchor Protocol’s unsustainable yield attracted massive inflows, but once the peg failed, cascading liquidations wiped out tens of billions and spread contagion across the broader market.
Real World Assets Stabilize Yield Base
To become sustainable, DeFi must integrate real-world assets. Closed-loop crypto economies cannot sustain themselves indefinitely. Lending protocols need exposure to external sources of yield such as government debt, trade finance, and private credit.
MakerDAO, now rebranded as Sky Protocol, has already moved heavily into U.S. Treasuries and private credit, creating more stable income streams during downturns. This shifts protocols closer to -based investment structures, though concerns remain that much of the value still depends on off-chain systems rather than fully on-chain economic logic.
Credit Systems Replace Collateral Dependence
Another key evolution is decentralized identity and on-chain credit scoring. Moving beyond over-collateralized lending is essential for real adoption. Zero-knowledge proofs allow borrowers to demonstrate creditworthiness without revealing sensitive data, enabling risk assessment based on financial history rather than collateral alone.
This could eventually allow DeFi to extend credit to real businesses in emerging markets, bringing productive activity onto the blockchain instead of purely speculative flows.
Modular Design Reduces Systemic Contagion
Protocol design also needs to become more modular. Early DeFi systems relied on shared liquidity pools, which are highly vulnerable to contagion. Newer models are introducing isolated markets where failures are contained rather than spreading across the entire system. Aave has already taken steps in this direction with isolation modes and risk segmentation.
Combined with better insurance mechanisms and improved smart contract security, these changes could make DeFi more resilient and attractive to institutional capital.
Speculative Culture Undermines Stability
We must also recognize that sustainability is as much about human behavior as it is about code. The culture of “get rich quick” schemes and astronomical annual percentage yields must be replaced by a culture of risk-adjusted returns and long-term value creation.
Regulatory clarity will play a vital role here. While some in the crypto space fear oversight, a clear legal framework provides the certainty needed for legitimate businesses to build on-chain. When investors can distinguish between a high-risk speculative play and a regulated, asset-backed lending product, the market will naturally gravitate toward the more sustainable options.
Meanwhile, watch out for the falling yields. Do not be caught by surprise.
Original post before edit for word count:
Why 90% of the DeFi Lending Protocols are Built to Fail? – How to Survive?
The promise of decentralized finance was once a clarion call for a democratic financial revolution. It envisioned a world where the rigid, exclusionary walls of traditional banking would crumble, replaced by transparent, automated, and permissionless protocols. As we navigate the complexities of 2026, the initial euphoria of the DeFi summer has matured into a sober realization. While the technology is revolutionary, the economic models underpinning most lending and borrowing protocols are fundamentally flawed. The current landscape is largely an exercise in reflexivity where value is borrowed from the future to pay for the present. Unless the industry shifts its focus from internal speculation to external utility, the entire ecosystem remains at risk of a slow, agonizing descent into irrelevance.
The fundamental reason current DeFi lending is unsustainable lies in its circular nature. In traditional finance, a loan is typically an injection of capital into a productive enterprise. A business borrows money to buy equipment, hire staff, or expand operations, creating a tangible economic surplus that pays back the interest. In contrast, the vast majority of DeFi lending is recursive. Users deposit volatile assets to borrow stablecoins, which they then use to purchase more of the same volatile assets. This creates a leverage loop that functions perfectly during a bull market but offers no intrinsic value to the broader economy. The yield generated is not the result of economic growth. It is instead a byproduct of increased demand for leverage among speculators. This system is a house of cards built on the assumption that asset prices will rise indefinitely.
Sustainability is further undermined by the reliance on inflationary tokenomics to attract liquidity. Many protocols employ liquidity mining programs that reward users with native governance tokens. This creates an environment of mercenary capital where investors move their funds to whichever platform offers the highest temporary yield. These tokens often lack any utility beyond the protocol itself, meaning their value is derived solely from the belief that someone else will buy them later. When the price of the governance token begins to slip, the yield dries up, the capital flees, and the protocol enters a death spiral. The collapse of Iron Finance in 2021 serves as a haunting reminder of this dynamic. The protocol relied on a partially collateralized stablecoin backed by a volatile native token. Once the market lost confidence, the reflexive relationship between the two assets triggered a total wipeout in mere hours.
The problem of capital inefficiency is another significant barrier to long-term viability. Traditional banking operates on fractional reserves and creditworthiness, allowing individuals to access capital they do not already possess. DeFi lending is almost exclusively over-collateralized. To borrow a certain amount of value, a user must lock up a significantly larger amount of value in a different asset. While this protects the protocol from default, it renders the system useless for the very people who need loans the most. A small business owner in an emerging market cannot use DeFi to grow if they must first possess one hundred and fifty percent of the loan amount in digital assets. This reliance on “pawning” rather than “crediting” ensures that DeFi remains a playground for the wealthy and the speculative rather than a tool for global financial inclusion.
The inherent risks of liquidation cascades pose a systemic threat to the stability of these platforms. In a decentralized environment, liquidations are automated by smart contracts. When the price of a collateral asset hits a certain threshold, the system triggers a sell-off to protect the lender. During periods of high volatility, these automated sales drive prices down further, triggering a secondary wave of liquidations. This creates a feedback loop that can crash a market faster than any human intervention could prevent. The catastrophic failure of the Terra/Luna ecosystem and its Anchor Protocol in 2022 demonstrated the fragility of these interconnected systems. Anchor offered a static twenty percent yield that was unsustainable by any traditional metric. When the underlying peg of the UST stablecoin faltered, the ensuing liquidation of collateralized Bitcoin and Luna wiped out tens of billions of dollars in value, causing a contagion that eventually toppled centralized lenders who had become over-exposed to the same circular risks.
To achieve true sustainability, the industry must pivot toward the integration of real-world assets (RWA). The era of the closed-loop crypto economy must end. Lending protocols need to serve as bridges to the real world, where interest is paid by legitimate borrowers such as homeowners, trade finance firms, and government entities. By tokenizing these assets, DeFi can tap into sources of yield that are independent of crypto market volatility. MakerDAO (now rebranding as Sky Protocol) has successfully shifted a massive portion of its collateral base into U.S. Treasury bills and private credit, the protocol has established a stable revenue stream that persists even during crypto bear markets. This evolution transforms the protocol from a speculative engine into a sophisticated, transparent investment bank. Before we go on, most of you know, I am not a big fan of RWA because most of the true value is off-chain. If the lending protocols can shift the core value and transaction logic entirely, rather than using blockchain as a form of digital receipt for an off- chain asset, this will be a different situation. This means the asset’s utility, cash flow, and enforcement are managed by code, minimizing reliance on traditional intermediaries.
Another pillar of sustainability is the development of decentralized identity and on-chain credit scoring. The shift from over-collateralized lending to under-collateralized or credit-based lending is the only way to make DeFi competitive with traditional finance. Using zero-knowledge proofs, protocols can verify a borrower’s financial history and repayment capacity without compromising their privacy. This allows the system to assess risk based on character and history rather than just the amount of collateral in a wallet. Protocols can facilitate loans to real-world businesses in emerging markets. By using a network of decentralized auditors to perform due diligence, they bring productive economic activity onto the blockchain, creating a win-win scenario for both lenders seeking stable returns and borrowers seeking growth capital.
The architecture of these protocols must also become more resilient through modular risk management. The “all-in-one” liquidity pool model of the past is too vulnerable to contagion. Future sustainable models will likely favor isolated markets where the failure of one niche asset cannot drain the liquidity of the entire protocol. Aave has made strides in this direction with its recent versions, introducing efficiency modes and isolation tiers that ring-fence risk. This technical maturity, combined with robust insurance layers and formal verification of smart contracts, will provide the security necessary for institutional capital to enter the space at scale. The above is what I believe before the KelpDAO exploit. I have a slightly different view after looking at how the protocol and community at large handled the short fall. This was discussed separately on another post I made.
We must also recognize that sustainability is as much about human behavior as it is about code. The culture of “get rich quick” schemes and astronomical annual percentage yields must be replaced by a culture of risk-adjusted returns and long-term value creation. Regulatory clarity will play a vital role here. While some in the crypto space fear oversight, a clear legal framework provides the certainty needed for legitimate businesses to build on-chain. When investors can distinguish between a high-risk speculative play and a regulated, asset-backed lending product, the market will naturally gravitate toward the more sustainable options.
Meanwhile, watch out for the falling yields. Do not be caught by surprise.
Anndy Lian is an early blockchain adopter and experienced serial entrepreneur who is known for his work in the government sector. He is a best selling book author- “NFT: From Zero to Hero” and “Blockchain Revolution 2030”.
Currently, he is appointed as the Chief Digital Advisor at Mongolia Productivity Organization, championing national digitization. Prior to his current appointments, he was the Chairman of BigONE Exchange, a global top 30 ranked crypto spot exchange and was also the Advisory Board Member for Hyundai DAC, the blockchain arm of South Korea’s largest car manufacturer Hyundai Motor Group. Lian played a pivotal role as the Blockchain Advisor for Asian Productivity Organisation (APO), an intergovernmental organization committed to improving productivity in the Asia-Pacific region.
An avid supporter of incubating start-ups, Anndy has also been a private investor for the past eight years. With a growth investment mindset, Anndy strategically demonstrates this in the companies he chooses to be involved with. He believes that what he is doing through blockchain technology currently will revolutionise and redefine traditional businesses. He also believes that the blockchain industry has to be “redecentralised”.
