WBTC (Wrapped Bitcoin) is an ERC-20 token launched in January 2019, designed to bring Bitcoin liquidity into Ethereum’s decentralized finance (DeFi) ecosystem. Each WBTC is backed 1:1 by Bitcoin, allowing users to participate in DeFi activities such as lending, staking, and yield farming on the Ethereum network while retaining the value of Bitcoin. WBTC is created through a "wrapping" process, where Bitcoin is locked in a custodian account (currently managed by BitGo) and an equivalent amount of WBTC is minted.

In 2024, WBTC's custodial structure underwent significant changes, sparking widespread attention in the crypto community. BitGo announced a partnership with Justin Sun (founder of Tron) and BiT Global, a Hong Kong-based firm, to decentralize WBTC’s custody across multiple jurisdictions, including Hong Kong and Singapore. This move aimed to enhance the decentralization of custody and reduce concentrated risks. However, due to Sun’s controversial history in the cryptocurrency space, this partnership raised concerns within the community. MakerDAO, a major DeFi protocol, voiced worries about Sun's involvement and discussed reducing its exposure to WBTC on its platform.

Despite these concerns, BitGo reassured the community that the security and transparency of WBTC remain unchanged, with key management procedures still in place to ensure that no single party has control over WBTC reserves. Justin Sun also clarified that his role is purely strategic, with no direct control over WBTC assets.

Although the 2024 custody changes have stirred controversy, particularly regarding Sun’s involvement, WBTC remains a crucial bridge between Bitcoin and Ethereum’s DeFi ecosystem. With the introduction of more decentralized custodial models, WBTC continues to offer users the opportunity to leverage their Bitcoin assets for smart contracts, decentralized lending, and staking. As the crypto landscape evolves, WBTC’s technical architecture and security are continually improving, providing users with more options in cross-chain applications. Looking ahead, innovations in decentralized custody and cross-chain applications are expected to further expand Bitcoin’s role within the Ethereum ecosystem.

Above are only for introduction, not intended as investment advice.