What is Wrapped Bitcoin (WBTC)

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Wrapped Bitcoin (WBTC) is a type of digital asset that represents Bitcoin on other blockchains. It is created through a process called "wrapping," in which Bitcoin is locked in a smart contract and issued as an ERC-20 token on the Ethereum blockchain. This allows users to use Bitcoin on Ethereum-based decentralized applications (dApps) and decentralized finance (DeFi) platforms that do not natively support Bitcoin. WBTC can be easily converted back into Bitcoin through a similar process, making it a useful bridge between the two cryptocurrencies.

How Does Wrapped Bitcoin Work?

WBTC is created through a process called "wrapping," which involves locking Bitcoin in a smart contract and issuing an equivalent amount of WBTC on the Ethereum blockchain. This process is carried out by authorized custodians, who hold the Bitcoin on behalf of WBTC holders and are responsible for issuing and redeeming the wrapped tokens.

To convert Bitcoin to WBTC, a user must first find an authorized custodian and send their Bitcoin to the custodian's address. The custodian will then verify the transaction and, once confirmed, issue an equivalent amount of WBTC to the user's Ethereum address.

To convert WBTC back into Bitcoin, the process is reversed. The user sends their WBTC to the custodian, who verifies the transaction and sends an equivalent amount of Bitcoin to the user's Bitcoin address.

It is important to note that the custodians play a crucial role in the wrapping process and are responsible for ensuring the security and integrity of the wrapped tokens. Users should carefully research and select a reputable custodian before participating in the WBTC ecosystem.

The Pros and Cons of Wrapped Bitcoin


Increased liquidity - By bringing Bitcoin to Ethereum-based platforms, WBTC can increase the liquidity of Bitcoin and make it more accessible to a wider range of users.

Wider adoption - WBTC can potentially increase the adoption of Bitcoin by allowing it to be used on platforms that do not natively support it.

Convenience - WBTC allows users to take advantage of the benefits of Bitcoin on Ethereum-based platforms without having to go through the process of exchanging their Bitcoin for another cryptocurrency.


Dependence on custodians - The wrapping process relies on authorized custodians, who are responsible for holding the Bitcoin on behalf of WBTC holders. This means that users are reliant on these custodians to securely manage their Bitcoin and issue and redeem the wrapped tokens. If a custodian becomes compromised or goes out of business, users may lose access to their WBTC.

Loss of control - Because WBTC is an ERC-20 token, it is subject to the rules and limitations of the Ethereum blockchain. This can potentially limit the functionality of WBTC and the control users have over their tokens.

Volatility - Like any cryptocurrency, WBTC is subject to price volatility and can fluctuate in value. This can make it a risky investment and may not be suitable for all users.

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