Wrapped Bitcoin

Last reviewed: May 31, 2026

Wrapped Bitcoin (WBTC) is a tokenized version of Bitcoin (BTC) that exists on the Ethereum blockchain. It allows Bitcoin holders to participate in the Ethereum ecosystem, including [decentralized finance (DeFi) applications](/wiki/decentralized_finance_defi_applications). WBTC is an ERC-20 token, which means it follows the Ethereum blockchain's token standard. This token is backed 1:1 by Bitcoin, meaning each WBTC is fully collateralized by an equivalent amount of Bitcoin held in reserve. As of October 2023, Wrapped Bitcoin facilitates interoperability between Bitcoin and Ethereum, enabling users to leverage Bitcoin's value while utilizing Ethereum's smart contract capabilities.

Overview

Wrapped Bitcoin was introduced in January 2019 as a collaborative project by several blockchain organizations, including BitGo, Kyber Network, and Ren. The primary goal was to bring the liquidity of Bitcoin to the Ethereum network, enhancing the functionality of both ecosystems. By converting Bitcoin into an ERC-20 token, WBTC enables Bitcoin holders to engage with Ethereum-based decentralized applications (DApps) and DeFi platforms without needing to sell their Bitcoin holdings.

Wrapped Bitcoin is fully backed by Bitcoin reserves, ensuring that each WBTC can be redeemed for one Bitcoin. This backing is maintained through a network of custodians and merchants who manage the minting and burning of WBTC tokens. The transparency of reserves is a critical aspect of WBTC, with proof of reserves publicly verifiable on the blockchain.

How it works

The process of creating Wrapped Bitcoin involves several key participants: users, merchants, and custodians. Users initiate the conversion by sending Bitcoin to a merchant. The merchant then coordinates with a custodian to mint an equivalent amount of WBTC on the Ethereum blockchain. This process ensures that each WBTC is backed by a corresponding Bitcoin held in reserve.

Minting and Burning

- Minting: When a user wants to convert Bitcoin to WBTC, they send Bitcoin to a merchant. The merchant then requests the custodian to mint the equivalent amount of WBTC. This newly minted WBTC is sent to the user's Ethereum wallet.

- Burning: To convert WBTC back to Bitcoin, the user sends WBTC to the merchant, who then requests the custodian to burn the tokens. The equivalent amount of Bitcoin is released from the reserve and sent back to the user.

This minting and burning process ensures that the supply of WBTC is always backed by an equivalent amount of Bitcoin, maintaining a 1:1 peg.

Applications

Wrapped Bitcoin has several applications within the Ethereum ecosystem, primarily in the DeFi space. By tokenizing Bitcoin, WBTC enables users to leverage Bitcoin's value in various financial services available on Ethereum.

Decentralized Finance (DeFi)

WBTC can be used as collateral in DeFi protocols, allowing users to borrow other cryptocurrencies or earn interest by lending their WBTC. Platforms like Aave and Compound support WBTC, providing users with opportunities to participate in yield farming and liquidity mining.

Trading and Liquidity

WBTC increases the liquidity of Bitcoin on decentralized exchanges (DEXs) such as Uniswap and SushiSwap. By providing Bitcoin liquidity on these platforms, users can trade WBTC against other ERC-20 tokens, enhancing the overall trading volume and market efficiency.

Cross-Chain Interoperability

WBTC serves as a bridge between the Bitcoin and Ethereum networks, facilitating cross-chain transactions and interactions. This interoperability expands the use cases for Bitcoin, allowing it to be integrated into Ethereum-based applications and services.

USDT">Relationship to USDT

While Wrapped Bitcoin and Tether (USDT) both operate on the Ethereum blockchain as ERC-20 tokens, they serve different purposes. USDT is a stablecoin pegged to the US dollar, designed to maintain a stable value for transactions and trading. In contrast, WBTC is a tokenized version of Bitcoin, allowing Bitcoin holders to participate in the Ethereum ecosystem.

Both WBTC and USDT enhance liquidity and accessibility within the cryptocurrency market. However, WBTC focuses on integrating Bitcoin's value into Ethereum's DeFi space, while USDT provides a stable medium of exchange and store of value across various blockchain platforms.

Advantages and disadvantages

Advantages

- Interoperability: WBTC enables Bitcoin holders to access Ethereum's DeFi ecosystem, increasing the utility of Bitcoin.
- Liquidity: By tokenizing Bitcoin, WBTC enhances liquidity on Ethereum-based platforms, facilitating more efficient trading and lending.
- Transparency: The reserve backing of WBTC is publicly verifiable, ensuring trust and security for users.

Disadvantages

- Centralization: The reliance on custodians for minting and burning introduces a level of centralization, which may concern some users.
- Complexity: The process of converting Bitcoin to WBTC involves multiple steps and participants, which may be cumbersome for some users.
- Ethereum Dependency: As an ERC-20 token, WBTC is subject to Ethereum's network congestion and gas fees, which can affect transaction costs and speed.

Sources

- CoinDesk.com)
- CoinTelegraph
- Tether
- Wrapped Bitcoin

Categories: Stablecoins | Decentralized Finance

Last updated: May 31, 2026