Rehypothecation vs Segregated Collateral: The Wrapped Bitcoin Risk Institutions Care About

Circle argues that the reliability of wrapped Bitcoin as institutional collateral depends on how reserves are treated, whether collateral can be rehypothecated, whether assets are legally segregated from an issuer’s balance sheet, and whether issuance, redemption, and verification controls function during market stress. It presents cirBTC as a 1:1 BTC-backed token designed for onchain credit markets, stating that its native Bitcoin reserves are held in segregated custody accounts through Circle entities, are not commingled with corporate assets, and can be monitored through Chainlink Proof of Reserve and transparent Bitcoin addresses. The company contrasts this approach with products that may rely on periodic attestations, permit collateral reuse, or combine issuance with exchange or lending operations that could create conflicts or additional counterparty exposure. Circle says institutional minting and redemption occur through Circle Mint and its custody and settlement infrastructure, while third-party protocols such as Aave and Morpho establish their own lending terms and collateral parameters. cirBTC is available on Ethereum, with a planned Arc deployment subject to regulatory approvals, and Circle notes that digital assets carry investment, technology, and regulatory risks and are not FDIC-insured deposits.

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