According to their product materials and CoinDesk's September 6 report, Better and Coinbase have brought bitcoin into a corner of US finance that rarely changes: the conforming mortgage. The product allows an approved borrower to pledge BTC to fund a home down payment while retaining a standard Fannie Mae-backed first mortgage on the property. The most consequential detail, however, sits below the headline. Better may reuse the pledged bitcoin, and the borrower cannot recover it until the conventional mortgage is fully repaid or refinanced.

The structure is significant because it turns bitcoin from an asset that would otherwise be sold for a down payment into collateral inside the housing finance system. It also creates a risk profile different from a typical crypto-backed loan. A drop in bitcoin's price does not trigger a margin call, but the borrower accepts counterparty exposure to Better and may leave the coins encumbered for the life of a 15-year or 30-year mortgage.

What Launched and How the Two-Loan Structure Works

In its March 26 announcement, Coinbase said it is working with Better on what the companies describe as the first crypto-backed conforming mortgage. Better originates and services the loans. Coinbase provides the account connection and custody infrastructure through Coinbase Prime, but it does not underwrite the mortgage or decide when collateral is sold.

The borrower receives two loans at closing. The first is a standard Fannie Mae-conforming mortgage secured by the home. The second funds the cash down payment and is secured by the borrower's bitcoin plus a second lien on the same property. Both loans carry the same interest rate and amortization term, so the borrower makes one combined monthly payment.

Only bitcoin is accepted at launch. Better's product page says other assets, including ETH and SOL, may be added later. The companies' earlier announcement also mentioned USDC, but CoinDesk reported that the partners chose to launch with BTC alone while they evaluate other collateral.

Why the 250% Collateral Ratio Matters

The initial collateral requirement is 250%, meaning a borrower must pledge $2.50 worth of bitcoin for every $1 borrowed through the down-payment loan. In the companies' example, a buyer purchasing a $500,000 home could pledge $250,000 of BTC to support a $100,000 down payment.

That buffer reduces the lender's exposure to bitcoin volatility at origination, but it does not make the transaction low risk for the borrower. The pledged BTC is moved from the borrower's Coinbase account to Better's custody account on Coinbase Prime. Better's page says the collateral is returned after the mortgage is fully repaid or refinanced, and a home sale requires the down-payment loan to be repaid before the bitcoin is released.

Bitcoin does not help an applicant qualify for the conventional mortgage. Better says borrowers must still meet ordinary income, credit score, and debt-to-income requirements. In written comments to CoinDesk, the company said: "Nothing in the product converts crypto holdings into qualifying income or waives DTI or credit thresholds."

How Rehypothecation Changes the Borrower's Risk

The most important legal and financial detail is Better's ability to reuse the pledged bitcoin. Better told CoinDesk: "Better may rehypothecate the pledged bitcoin, provided it keeps equivalent Bitcoin on hand to return the collateral at loan payoff."

Rehypothecation means the collateral may be used in another transaction rather than remaining untouched in custody. The practice is long established in traditional finance, where securities brokers routinely reuse client collateral under regulatory limits. In the crypto sector, however, the 2022 failures of Celsius and FTX showed how opaque reuse of customer assets can leave users competing as creditors in bankruptcy rather than reclaiming their property — a history that shapes why collateral reuse terms now receive close scrutiny in crypto lending.

The borrower is promised an equivalent amount of bitcoin back, not necessarily the same coins. That distinction matters if Better or one of its financing partners fails while the collateral is being reused.

Better says its borrower agreements and custody arrangements comply with applicable laws, including insolvency rules. However, the public materials reviewed for this article do not answer whether each borrower's bitcoin remains separately identifiable, who holds legal title after rehypothecation, or whether the borrower would have a property claim rather than a creditor claim in a failure scenario. Those questions should be answered in the loan documents before a borrower pledges a large BTC position.

For related context, see The Bit Journal's coverage of Strike's Bitcoin-backed loans without price-based margin calls. Repayment and collateral terms differ between products.

Why Price Drops Do Not Trigger Margin Calls

The product differs from a margin loan in one important way: a decline in bitcoin's price does not require the borrower to add collateral and does not trigger an automatic sale. Better says liquidation is tied to payment delinquency, not to the market value of the pledged BTC.

A missed combined payment starts the delinquency process. Better says it may liquidate pledged bitcoin after 60 days of delinquency, following notice to the borrower, and would sell only enough to repay debt and bring the account current. Foreclosure on the home may begin after 180 days of delinquency under Fannie Mae guidelines. Better says it must pursue the bitcoin first, although standard lending remedies may still apply if the collateral sale leaves a shortfall.

That design may appeal to borrowers who want to avoid forced selling during a market drawdown, but it does not remove housing risk. A borrower who cannot make the combined monthly payment can still lose the pledged bitcoin and, eventually, the home.

What This Means for the Market

The product is an early test of whether bitcoin can function as collateral inside regulated housing finance without being sold. Better told CoinDesk that requested loan volume in pre-applications reached $360 million after the public launch, up from $260 million projected by borrowers on the earlier waitlist. The company also said 35.9% of current applicants hold more than $500,000 in crypto and 38% plan to buy a home in the next three months.

Those figures point to demand from a specific group: borrowers with substantial crypto wealth who meet conventional mortgage standards but prefer not to liquidate BTC. Selling appreciated crypto to fund a down payment can also carry tax consequences, which is one reason long-term holders often look for ways to borrow against holdings instead. The product is not a route around credit underwriting, and it does not make volatile assets count as income. Its broader significance lies in the connection between Coinbase Prime custody, a conforming mortgage, and a second-lien down-payment loan.

If the structure performs through a full credit cycle, other lenders may test similar products. If rehypothecation or collateral recovery becomes a dispute in a downturn, the same structure could become a cautionary case for both crypto lenders and housing finance firms.

Risks and What to Watch

The first risk is counterparty exposure: rehypothecation means the borrower depends on Better's ability to return equivalent bitcoin years or decades later. The second is legal clarity — borrowers need to know whether they retain a property claim over identifiable coins or become unsecured creditors in a failure.

The third risk is time. The collateral can remain locked until the main mortgage is repaid or refinanced, even though it secures only the separate down-payment loan. The fourth is behavioral: a borrower may treat the absence of margin calls as a reason to pledge more BTC than is prudent, even though payment delinquency can still lead to liquidation.

The key documents to watch are the final borrower agreement, custody terms, insolvency language, and any expansion beyond bitcoin. The key business metrics are actual funded loan volume, delinquency rates, and whether Better changes the 250% collateral requirement.

FAQ

Does bitcoin count as income for the mortgage?

No. Better says applicants must meet standard income, credit, and debt-to-income requirements independently of their crypto holdings. The bitcoin is used as collateral for the down-payment loan, not as qualifying income.

Can a bitcoin price crash trigger a margin call?

No. Better says price movements do not trigger margin calls or automatic liquidation. The company may sell pledged BTC after 60 days of payment delinquency, subject to the loan terms and borrower notice.

When does the borrower get the bitcoin back?

Better says the pledged BTC is returned after the conventional mortgage is fully repaid or refinanced. If the home is sold, the down-payment loan must be repaid before the collateral is released.

What does rehypothecation mean?

Rehypothecation allows Better to reuse the pledged bitcoin while promising to return an equivalent amount when the loan ends. The borrower is not assured that the same coins will remain untouched in custody.

Is Coinbase the lender?

No. Better originates and services the loans. Coinbase provides the account connection and Coinbase Prime custody infrastructure, but it does not underwrite the mortgage or decide when collateral is liquidated.

This article is for information only and is not investment, legal, tax, or mortgage advice. Borrowers should review the full loan and custody documents and consult qualified advisers before pledging digital assets.