Coinbase Goes Fixed-Rate: What It Means for Bitcoin Borrowers

On September 22, 2026, Coinbase added a fixed-rate option to its bitcoin-backed loans. Borrowers can now lock in an interest rate and a repayment date when they take out the loan, rather than watching the cost of borrowing move around on them. For anyone who has used crypto as collateral, a predictable rate is a real improvement. But if your actual goal is to buy a home with your bitcoin working for you, a fixed rate answers only one of the questions that matter. This post breaks down what Coinbase's new product does, what it does not do, and how a crypto-backed loan differs from a crypto mortgage.

What Coinbase actually launched

The new product lets Coinbase users borrow USDC against their bitcoin at a fixed rate. It runs on Morpho Midnight, the lending rail Morpho launched on the Base network earlier in 2026 for fixed rates and fixed maturities. Coinbase manages the app experience, Morpho provides the lending protocol, and the loans settle on-chain on Base. Borrowers select a term, and the fixed-rate option allows loans of up to $5 million.

This sits on top of a business that is already large. Coinbase's variable-rate loans have more than $1.4 billion outstanding against roughly $3 billion in collateral, and Morpho's own dashboard has shown around $1.56 billion in outstanding Coinbase-linked borrowing across about 53,000 borrowers. Demand for borrowing against crypto is not a niche anymore. One widely cited figure from CryptoQuant put retail crypto borrowing up 74% year over year. The category is growing, and Coinbase is moving quickly inside it.

A fixed rate removes one specific pain point. With variable-rate crypto loans, the interest rate floats, so the amount you owe can climb if borrowing conditions tighten. Locking the rate gives you a payment you can plan around. That is genuinely useful. It is also the beginning of the conversation, not the end of it.

The difference between a loan and a mortgage

A Coinbase bitcoin loan gives you USDC. A mortgage gives you a home. That distinction sounds obvious, but it changes everything about how the money can be used, how long you have to repay, and what happens if the market moves.

A crypto loan against bitcoin is a general-purpose loan. You pledge bitcoin, you receive stablecoin, and you repay on the schedule you selected. If you want to turn that USDC into a house, you still have to convert it, move it into the traditional banking and escrow system, and satisfy a seller or a closing agent who deals in dollars. The loan was not built around a home purchase, so the terms are not built around one either. Loan maturities are measured in months, not the decades a homebuyer expects, and the full balance comes due at the end of the term.

A crypto mortgage is a home loan from the start. It is underwritten to finance a specific property, it closes through the normal real estate process, and it is structured to be repaid over a long horizon the way any mortgage is. The collateral model is different too, and that is where homebuyers should spend their attention.

Fixed rate does not fix the collateral question

When you borrow against bitcoin, the most important question is not only the interest rate. It is what happens to your bitcoin while the loan is open. A fixed rate tells you what you will pay. It does not tell you who holds your collateral, whether that collateral can be moved or reused, or what event forces a sale.

Those are the questions worth asking of any crypto lender:

• Is this a mortgage that finances a home, or a loan that hands you stablecoin you then have to deploy yourself?
• Who holds the pledged bitcoin, and can it be moved or reused while the loan is open?
• What price movement triggers a margin call or a liquidation, and how much warning do you get?
• How long is the term, and is it built for a home purchase or for short-term borrowing?

A fixed interest rate is a good feature. It simply sits on top of these structural questions rather than resolving them. Two loans can carry the same headline rate and still treat your bitcoin in very different ways.

How a Milo crypto mortgage is built differently

Milo is a crypto mortgage lender, not a crypto loan desk. The product is designed to help bitcoin holders buy a home without selling their bitcoin, and the structure reflects that purpose.

Milo uses a two-loan approach: one loan is secured by the property you are buying, and a second is secured by the crypto you pledge. Because the home itself is financing collateral, qualified borrowers can finance up to 100% of the purchase when they pledge crypto, so they are not forced to liquidate holdings to cover a down payment. Selling bitcoin to buy a home can also trigger capital gains taxes. Borrowing against it instead of selling it keeps you invested and sidesteps that taxable event, which matters more when bitcoin is near recent highs and nobody wants to part with their stack.

Custody is the piece homebuyers most often overlook. With Milo, pledged crypto is held by a qualified custodian. It is not rehypothecated, meaning it is not lent out or reused while your loan is open. You pledge it, it is held, and it is returned when the loan is satisfied. Collateral is also optional in the sense that it is part of a specific crypto mortgage structure rather than a requirement on every product, so borrowers can choose the path that fits their situation.

None of this removes market risk. Crypto is volatile, and like any secured crypto product, a Milo crypto mortgage can involve margin calls if the value of pledged collateral falls far enough. The honest difference is not that risk disappears. It is that the structure is a long-term home loan with transparent custody, rather than a short-term stablecoin loan where your collateral sits inside a protocol and the clock runs out in months.

What this means if you are deciding right now

Coinbase adding a fixed rate is a sign that borrowing against bitcoin is becoming mainstream, and that is good for everyone in the category. If what you need is short-term USDC and you are comfortable managing the collateral and the maturity yourself, a fixed-rate crypto loan is a cleaner version of a tool that already existed.

If what you actually want is to own a home while keeping your bitcoin, that is a different product with different questions behind it. Look past the headline rate to the term length, the custody model, and whether the loan was ever designed to buy a house in the first place. A fixed rate is worth having. A mortgage built for bitcoin holders, with collateral held by a qualified custodian and a repayment horizon that matches homeownership, is a different thing entirely.

Ready to use your bitcoin to buy a home?

Milo helps bitcoin holders finance a home without selling their crypto, with a mortgage structure built for the long term and collateral held by a qualified custodian. Learn more at milo.io.

The opinions expressed in the Blog are for general informational purposes only and are not intended to provide specific advice or recommendations for any individual or on any specific security or investment product.