Circle Launches Bitcoin-Backed USDC Borrowing as BTC Holds Above $86K
September 22, 2026
Circle Turns Bitcoin Into Collateral Without a Sale
Circle, the company behind the USDC stablecoin, has launched a service that lets institutions borrow dollars against their Bitcoin without selling a single coin. The product, called Digital Asset-Backed Borrowing, went live inside Circle Mint on Monday, Cointelegraph reported. The timing is pointed. Bitcoin climbed above $86,000 on the same day, its highest level since late January, making holders less willing to sell and more interested in ways to unlock liquidity while remaining exposed to the Bitcoin price.How the New Borrowing Service Works
The workflow runs in three steps. A qualified Circle Mint customer deposits Bitcoin, Circle mints cirBTC, its wrapped Bitcoin token backed one-to-one by coins held at Circle National Trust, and the customer then supplies that cirBTC as collateral to a lending market through a wallet they control. USDC borrowed against the collateral is credited straight to the customer’s Circle Mint balance. Repayment works in reverse: pay down the loan and the cirBTC is released. The service launched on Ethereum and on Arc, Circle’s own blockchain. Morpho is the only lending protocol supported at launch, with Circle saying it plans to add Aave and others over time. New York clients are excluded for now.What Overcollateralized Actually Means
For beginners, the key phrase in Circle’s announcement is “overcollateralized.” It means a borrower must lock up more value in Bitcoin than the dollars they take out. Post $100 of Bitcoin, for example, and the market might allow a loan of $86 or less. That buffer protects the lender if Bitcoin falls. If the price drops far enough that the loan approaches the value of the collateral, the position can be liquidated, meaning the Bitcoin is sold automatically to repay the debt. The borrower never has to sell voluntarily, but a sharp enough downturn can force the sale anyway. This is the same logic behind a mortgage or a margin account, translated to a blockchain, where the rules are enforced by code rather than by a loan officer.
Morpho Sets the Rates, Circle Runs the Rails
Circle is careful about what it does and does not control. Borrowing rates, collateral requirements and liquidation thresholds are set by the lending market the customer selects, not by Circle. According to Circle’s product terms, the company does not operate, audit or accept responsibility for the DeFi protocols involved, and liquidations are the protocol’s business. The wallet layer is Circle’s. Its Smart Wallet uses two-of-two multi-party computation for key management, so a transaction needs two key shares to sign, and Circle says it cannot unilaterally initiate, cancel or reverse a transaction on a customer’s behalf. Early numbers show the market is still small. CryptoSlate reported that the Morpho market on Arc had a liquidation loan-to-value limit of 86%, about $14.13 million borrowed against $176.99 million of market size, and utilization near 8% as of Sept. 21. Total cirBTC outstanding stood at roughly 948.75 tokens against 951.26 BTC in reserves the day before.Arc Gives the Product a Home Network
The launch lands less than a week after Arc’s mainnet went live on Sept. 16. Arc is a Layer 1 blockchain built by Circle that uses USDC as its gas token, so fees are paid in dollars rather than a volatile coin, and it already hosts tokenized funds such as BlackRock’s BUIDL and Circle’s own USYC. cirBTC first appeared on Ethereum in June. Bringing it to Arc on Monday, alongside the borrowing service, gives Circle a closed loop: Bitcoin comes in, a Circle-issued token represents it, Circle’s stablecoin is borrowed against it, and the whole transaction can settle on Circle’s chain.Why Institutions Want Dollars Without Selling Bitcoin
Trading desks, market makers, and treasuries often hold Bitcoin they do not want to sell, either because they expect it to rise or because selling it would trigger a taxable event. Borrowing against it frees up working capital while the exposure remains on the books. Circle is not alone in chasing that demand. Cointelegraph notes that Anchorage Digital partnered with Kamino in February for Solana-backed borrowing; Lombard, Bitwise, and Morpho launched Bitcoin-backed loans in March that keep coins in custody without wrapping; and BitGo rolled out a portfolio-based lending platform the same month. Retail investors do not qualify for Circle’s product, but the same mechanics are increasingly available at the consumer level, from exchanges where users can buy crypto and then borrow against it to DeFi apps accessed from a self-custody crypto wallet.What Could Come Next for Bitcoin-Backed Credit
If Aave and other protocols are added as planned, borrowers may gain a choice of rates and collateral terms inside a single Circle Mint account, which could push lending markets to compete for institutional flow. Circle has not given a timeline. Growth is far from certain. Utilization near 8% on the Arc market suggests demand is early, and any sharp Bitcoin drawdown could trigger liquidations that test how well the wrapped-collateral model holds up under stress. Regulation is another variable, with stablecoin issuers now operating under the framework set out in the Treasury’s first GENIUS Act rule.A Test of Whether Stablecoin Rails Can Carry Credit
The significance of Monday’s launch is less about one lending product and more about what Circle is assembling. A regulated stablecoin, a wrapped Bitcoin token backed by a national trust, a user-controlled wallet and a proprietary blockchain now fit together into something that looks like a full credit stack. Whether institutions trust that stack with meaningful size is the open question. The collateral is Bitcoin, the loan is USDC, and the risk sits with the protocol in between. If the model works through a volatile market, Bitcoin-backed borrowing could move from a niche DeFi activity to a standard treasury tool. If it does not, the 86% liquidation line will be where the lesson is learned.
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Madiha Riaz
Madiha is a seasoned researcher in cryptocurrency, blockchain, and emerging Web3 technologies. With a background in organic chemistry and a sharp analytical mindset, she brings scientific depth to decentralized innovation. Since discovering crypto in 2017 and investing in 2018, she’s been uncovering and sharing deep insights into how blockchain is redefining the digital asset landscape.
