Bitcoin Virtual Machine, SatoshiVM, Spiderchain and BitVM are among those that recently emerged with the aim of expanding the functionality of Bitcoin.
Source: https://cointelegraph.com/news/bitcoin-needs-defi-scalability-mass-adoption-layer2-devs
Bitcoin needs DeFi, consumer apps, to see mass adoption: L2 devs
February 2, 2024
CoinTelegraph