Borrowing Against Bitcoin Without Selling It: How Wrapped Tokens Enable Loans

Bitcoin holders who need liquidity can avoid selling their BTC by converting it into a wrapped token that lives on another blockchain, typically Ethereum. The token can then be pledged as collateral for a loan, allowing the borrower to keep exposure to Bitcoin’s price while receiving stablecoins or other assets.

How Wrapped Bitcoin Works

A custodian receives the original BTC and mints a corresponding token on a target network. The token represents one BTC and can be transferred independently of the underlying coin. Redemption burns the token and releases the BTC back to the owner.

Key Players

• WBTC – a widely used wrapped Bitcoin token backed by a merchant network.
• cbBTC – Coinbase’s version, integrated with its exchange accounts.
• cirBTC – Circle’s institutional offering, linked to its USDC ecosystem.

Using Wrapped Bitcoin as Collateral

Smart contracts on Ethereum accept the wrapped token as pledged collateral. Borrowers receive dollar‑linked stablecoins and must over‑collateralize to protect lenders against Bitcoin price drops. If the price falls below a threshold, the contract can liquidate the collateral, exposing the borrower to the same risk they sought to avoid.

Risks and Trade‑offs

• Reliance on a custodian to safeguard the underlying BTC.
• Dependence on the token issuer’s redemption process and reserve transparency.
• Exposure to smart‑contract failures or inaccurate price feeds.
• Potential liquidation if Bitcoin’s value declines sharply.

Why Multiple Wrappers Exist

Each wrapper competes on ease of conversion, integration with existing services, and acceptance by lending platforms. Broad market adoption improves liquidity, making the token more attractive as collateral and encouraging more borrowing opportunities.

Considerations for Borrowers

Before using a wrapped token, users should verify the custodian’s reserve disclosures, understand redemption timelines, and assess the lending platform’s liquidation mechanisms. The convenience of borrowing must be weighed against the added fees and institutional dependencies.