To make Bitcoin more programmable and productive in decentralized finance (DeFi), it needs to be tokenized, such as in the form of WBTC and the upcoming sBTC. WBTC is the most popular tokenized Bitcoin on Ethereum, but it faces issues of centralization and cost. In contrast, sBTC, supported by Stacks, features a decentralized design and is scheduled for release in 2024. It aims to enhance security and cost efficiency through an open network of verifiers. The launch of sBTC will offer Bitcoin holders more opportunities to leverage their assets in DeFi.