This week in East Eight Time Zone, Coinbase launched a controversial new product in collaboration with traditional mortgage institutions: allowing users to use BTC and USDC as collateral for the down payment, with mortgages issued by partner institutions. This design is claimed to be compliant with Fannie Mae standards, presenting an opportunity to directly enter the mainstream mortgage system in the United States, yet it has been questioned for potentially embedding new systemic risks. On one hand is the tech-finance story of “using coins to buy houses” with nearly zero cash down payment; on the other hand, there are concerns about the chain reaction of cryptocurrency price fluctuations being deeply embedded in real estate leverage—when coin prices and housing prices are pushed onto the same debt chain, who bears the risk?

From Crypto Sphere to Real Estate: How Crypto Down Payments are “Packaged” into Mortgages

In the basic process of this product, homebuyers first pledge BTC or USDC to Coinbase, which acts as a custodian and financing bridge; then, traditional mortgage institutions like Better issue a standard home mortgage loan based on this pledged asset. On the surface, users still receive a traditional mortgage contract, with interest rates, terms, and repayment methods that do not differ significantly from regular mortgages—only the source of the down payment has been “outsourced” to crypto assets.

For many users who hold “more coins and less cash,” this structure offers a direct experience of achieving near zero cash down payment: there is no need to first sell BTC or USDC for dollars to make the down payment, but rather use the holdings as collateral to immediately leverage a whole set of mortgage financing. On paper, there are no transaction records of “selling coins to reduce positions,” yet one can “buy the house,” as if completing a painless transition of asset forms.

More importantly, this product is designed to be compliant with Fannie Mae standards, meaning that in terms of credit pricing, compliance framework, and risk control indicators, it can be regarded as part of mainstream mortgages, with the potential to be packaged, securitized, and circulated in the secondary market in the future. This is not just a niche crypto service, but an attempt to directly integrate crypto asset down payments into the front doors of the U.S. housing finance system, with far-reaching effects beyond a single transaction.

Dual Loan Overlay: The Invisible Interest Snowball

However, behind the “near zero down payment experience” is a more complex dual debt structure. Users receive financing from Coinbase by pledging BTC or USDC, forming a borrowing chain based on crypto assets; on the other hand, they carry a full mortgage loan with principal and interest within the traditional financial system. The two debt chains operate in parallel, meaning users must bear two sets of interest costs, with one set wrapped up in the “collateral coin” narrative, making it less intuitive.

Under the amplification effect of high leverage, the fluctuations in the value of BTC and USDC collateral directly affect this crypto-side debt chain: when coin prices rise, the collateral value increases, and users feel at ease; however, if coin prices drop significantly, the safety margin of the collateral shrinks, increasing the pressure for margin calls, additional collateral, or forced liquidation of assets. What started as a standard mortgage is now layered with a financing line that is highly sensitive to coin prices, greatly amplifying overall repayment pressure with market fluctuations.

On the surface, this structure significantly lowers the “entry threshold,” reducing the initial cash pressure on homebuyers. However, users’ overall debt levels are invisibly elevated: traditional credit reports only record the mortgage itself, making it difficult to present the leverage on the crypto collateral end fully, yet the latter is crucial in determining whether users can maintain normal repayments at key moments. This invisible interest snowball, once resonating with price fluctuations, often rolls much faster than the risk tolerance expectations of ordinary homebuyers.

Close to 100% Financing: Peter Schiff's Warning

Long-term critic of crypto assets, economist Peter Schiff points out the core issue of such structures: using crypto assets for “second loans” effectively pushes home financing towards approximately 100% financing, greatly amplifying default risks. In his view, using BTC or USDC as collateral to replace cash down payments essentially shifts risks that should be borne by homebuyers back to the financial system and future market participants.

In traditional mortgage models, down payments serve a crucial risk buffer: homebuyers putting up 20%-30% of real cash or liquid assets not only indicate a willingness to hold long-term but also provide the first layer of safety against price declines. Even with slight price corrections, the value of the home is typically enough to cover the remaining loan principal and interest. However, in this “crypto second loan” model, the down payment is essentially debt secured by highly volatile assets, rather than the net capital invested by the homebuyer, significantly weakening the safety net.

Once a scenario occurs where there is a decline in housing prices or a crash in the crypto market, the problem is amplified concurrently: weakening housing prices erode the collateral value on the mortgage side, while plunging crypto assets compress collateral values on the coin side, thinning the safety layers on both chains simultaneously. This makes it harder for homebuyers to maintain ongoing repayments on the front end, and forces financial institutions to face higher default and liquidation pressures on the back end, potentially leading to auction prices below loan balances, causing chain write-downs. Schiff's concern is precisely that this structure of “almost no real down payment” pushes a portion of volatility that could otherwise be absorbed by the down payment layer entirely onto a more fragile tail.

Compliance Cloak and Tug of War of Systemic Risks

From the perspective of product designers, incorporating such crypto-collateralized mortgages under Fannie Mae standards is a carefully constructed compliance logic: as long as they meet existing credit scoring, income verification, and repayment ratio indicators, they can be regarded as “qualified mortgages,” allowed to circulate and be packaged within the current regulatory framework. The direct effect of this compliance endorsement is that the speed of market diffusion may be significantly accelerated, enabling more institutions to undertake, invest in, or even re-securitize such assets within familiar rules.

However, the same “compliance cloak” sharpens discussions about systemic risks. Once these products scale up, fluctuations in crypto asset prices can be magnified and transmitted to the mortgage market through changes in collateral value and increased default probabilities, eventually extending through securitized products and institutional balance sheets into the broader financial system. The high volatility characteristics of crypto assets will no longer be limited to realized gains and losses on exchange accounts but will start to directly affect the housing assets of ordinary families and the stability of financial institutions holding these assets.

For regulators, the focus of concern will be the accumulation of three types of hidden worries:

● Leverage Accumulation: Under traditional leverage regulatory indicators, such products may appear relatively healthy because “the down payment is considered paid,” but they conceal hidden liabilities on the coin side, resulting in an underestimation of overall leverage levels.

● Asset Mismatch: Using high-volatility, intermittently liquid crypto assets to support long-term, relatively rigid housing mortgages is itself a structure with a high mismatch of duration and risk nature, potentially amplifying runs and passive deleveraging in extreme market conditions.

● Moral Hazard: When users believe “crypto collateral + compliant mortgage” is a path recognized by the system, their subjective perception of risk may be weakened, making them more willing to take on higher leverage to speculate on asset appreciation, leaving tail losses to a larger financial network.

Domino Effect of Bundling Crypto with Traditional Finance

If we extend the view to extreme scenarios, we can more clearly see the potential chain reaction paths of this new channel. Suppose there is a sharp downturn in the crypto market at a certain point, and the market values of BTC and USDC drop significantly, rapidly deteriorating collateral ratios, leading Coinbase to trigger a series of collateral disposals and risk control actions. Simultaneously, if the macro environment tightens or regional economic pressures increase, housing prices in certain areas may decline, and ordinary homebuyers’ cash flows tighten, leading to increased mortgage delinquency rates.

In such stress tests, collateral disposals triggered by crypto asset crashes and mortgage defaults in the real estate market may occur simultaneously: on one side, there are forced sales of BTC and USDC pushing prices down further; on the other side, the quality of mortgage assets worsens, forcing increased auctioning of homes and lowering already fragile prices. The spirals of dual market prices can then adversely affect financial institutions' asset quality and capital adequacy levels, subsequently impacting broader credit supply and investment risk tolerance.

For the housing market, this deep coupling could bring triple impacts:

● Price Side: When the down payment side is filled with volatility, some homebuying demand may be excessively released during crypto bull markets while rapidly depleting during bear markets, leading to a more severe housing price cycle.

● Institution Side: Financial institutions undertaking such mortgages must face the combined risks of housing prices and coin prices, complicating their asset portfolio stress testing, possibly causing traditional risk control models to fail.

● Sentiment Side: Once media narratives switch from “the wealth story of buying houses with BTC” to “the sequence of price crashes in coins + mortgage blowups,” investor and homebuyer confidence can suffer simultaneously across multiple asset lines, leading to a rapid spread of risk-averse sentiment.

Ultimately, the question for the industry and regulators is the boundary of financial innovation: while expanding housing accessibility and enabling more people to “get on board” in more flexible ways, how can we avoid packaging hard-to-measure, hard-to-price tail risks into an already highly sensitive housing finance system? The closer innovation gets to core livelihood assets, the more visibility and control over systemic risk pathways are needed.

The Ceiling of Innovation: How Close Should Mortgages and Crypto Be?

Overall, allowing BTC and USDC to participate in down payment financing indeed offers new opportunities for users whose assets are primarily concentrated in the crypto world: they can allocate physical assets without being forced to liquidate positions, theoretically achieving asset diversification. However, the same design also introduces a layer of hidden leverage into this critical down payment process, tying the price risks of highly volatile assets to long-term housing debt, amplifying systemic exposure in tail scenarios.

For market participants, whether individual homebuyers or institutional investors, in the pursuit of asset appreciation and layering leverage to “exchange coins for housing,” it is essential to recognize the dual debt risks within this structure: one from the mortgage itself and another from the financing on the crypto collateral side. The two chains may superficially be packaged as “compliant products + technological innovation,” but in extreme market conditions, they can become two heavy shackles on the same hand.

Going forward, the dynamic around these products is bound to perpetually unfold between regulators, platforms, and users. What regulators need to define is under what levels of leverage and asset composition structures systemic risks remain controllable; what platforms need to undertake is enhancing the transparency of product structures and stress testing standards, rather than merely telling a story of “safe home buying with zero down payment”; what users need to establish is an understanding of the complex risks arising from the interweaving of crypto and physical assets, rather than simply viewing “compliance” as “risk-free.” Innovation can push boundaries, but each advance toward core asset domains always raises the same question: this time, are we truly prepared to bear the worst of it?

Join our community to discuss and strengthen together!
Official Telegram community: https://t.me/aicoincn
AiCoin's Chinese Twitter: https://x.com/AiCoinzh

OKX benefits group: https://aicoin.com/link/chat?cid=l61eM4owQ
Binance benefits group: https://aicoin.com/link/chat?cid=ynr7d1P6Z

免责声明：本文章仅代表作者个人观点，不代表本平台的立场和观点。本文章仅供信息分享，不构成对任何人的任何投资建议。用户与作者之间的任何争议，与本平台无关。如网页中刊载的文章或图片涉及侵权，请提供相关的权利证明和身份证明发送邮件到support@aicoin.com，本平台相关工作人员将会进行核查。