Where Does Bitcoin Collateral Actually Go When Borrowing Cash? Inside CeFi and DeFi Custody Models
Crypto-collateralized lending reached $56.16 billion outstanding at the close of Q2 2026 across centralized lenders and decentralized protocols, according to Galaxy Research. While borrowers secure fiat or stablecoins against their Bitcoin, the underlying collateral faces vastly different custody rules, rehypothecation risks, and retrieval mechanisms depending on the platform structure.
In bankruptcy-remote centralized setups, such as Ledn's Custodied Loans, Bitcoin posted as collateral may be transferred to institutional USD funding partners or asset-backed financing vehicles. However, assets remain legally ring-fenced and verifiable, with documentation barring partners from lending the Bitcoin out for interest. Conversely, standard CeFi platforms often retain contractual rights to rehypothecate deposited collateral to third parties for yield, creating severe counterparty repayment chains reminiscent of the 2022 collapses of Celsius, BlockFi, and Voyager.
Decentralized lending introduces a dual-layer custody framework when utilizing wrapped assets like Coinbase's cbBTC, which boasts a circulating supply of roughly 95,900 tokens valued near $8.1 billion per CoinGecko. Native Bitcoin sits in Coinbase's custody, while the minted token operates across smart contracts:
• On Aave ($19.5B TVL per DeFiLlama), supplied assets join pooled liquidity and can be borrowed by other users.
• On Morpho ($11.1B TVL per DeFiLlama), collateral remains isolated from loan pools and is not lent out to other borrowers.
Borrowers retrieving collateral face distinct recovery mechanics. Ring-fenced CeFi loans release original Bitcoin upon full debt repayment, while rehypothecating platforms depend on recalling collateral from external counterparties. In DeFi structures, loan payoff unlocks wrapped tokens from the contract, requiring a secondary custodial redemption through Coinbase to recover native BTC, provided margin calls or automated liquidations were not triggered.
