Circle Mint lets institutions borrow USDC against Bitcoin without selling their BTC

Selling Bitcoin to access cash is the crypto equivalent of selling your house to pay rent. Circle wants to end that tradeoff for institutional holders. The company launched a Digital Asset-Backed Borrowing feature on its Circle Mint platform, giving eligible institutions a way to unlock USDC liquidity while keeping their BTC position intact.

The feature went live on September 2, 2026, with Morpho as its first integrated lending market, running across both Ethereum and Arc, Circle’s new EVM-compatible Layer 1 blockchain.

How the mechanics actually work

The workflow has three steps. An institution deposits BTC into Circle Mint. That BTC gets wrapped into cirBTC, a tokenized version backed 1:1 by BTC held in custody at Circle National Trust. The cirBTC then serves as collateral inside Morpho vaults, and the resulting USDC loan settles directly back into the borrower’s Circle Mint account.

Repaying the loan releases the collateral, returning cirBTC and eventually the underlying BTC. The whole cycle stays within the Circle Mint interface, so institutions avoid stitching together custody, bridging, and DeFi protocols on their own.

Chainlink’s proof-of-reserves verification underpins the cirBTC backing, giving lenders on the other side of the trade an on-chain confirmation that the collateral is real and accounted for. Interest rates and collateral ratios are determined by Morpho’s market parameters rather than set by Circle, which means they float with supply and demand.

One geographic caveat: the service is not available to clients based in New York.

The day-one numbers from Arc

Circle’s Arc mainnet launched publicly around September 16, 2026, and the early demand for cirBTC-backed borrowing was hard to ignore. On Arc’s launch day, Morpho vaults backed by cirBTC drew over $150 million in USDC and EURC deposits.

Why this matters beyond the product itself

The choice of Morpho as the launch partner reflects a deliberate bet on permissioned DeFi. Morpho’s vault architecture allows for curated risk parameters, which makes it better suited to institutional compliance requirements than fully open lending pools. Circle has signaled plans to expand to additional protocols, with Aave named as a future integration target.

Arc’s role in this picture is worth watching. By launching cirBTC borrowing simultaneously on Ethereum and its own chain, Circle is not just offering a product. It is seeding demand for activity on Arc itself. A lending market with $150 million in day-one deposits gives developers and other protocols a reason to build on the chain.

For institutional Bitcoin holders specifically, the DABB feature changes the calculus on holding BTC through market cycles. Rather than facing a binary choice between holding and selling, large holders can now borrow against their position to fund operations, meet capital calls, or deploy into other opportunities, without triggering a taxable sale or abandoning their BTC upside.

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