Bitcoin's most significant limitation in the decentralized finance (DeFi) space is currently facing scrutiny, as the newly launched OpNet platform has successfully introduced the capability to utilize smart contracts on the Bitcoin mainnet. This development marks a pivotal moment in the evolution of Bitcoin, enabling enhanced functionality and greater potential for innovative financial applications that were previously constrained by the lack of smart contract support. With OpNet, users can now leverage the advantages of decentralized finance while benefiting from the security and stability that Bitcoin is known for. As this technology gains traction, it will likely spark discussions and debates around the future of Bitcoin in the DeFi landscape and its capacity to compete with other blockchain platforms that offer more advanced programming capabilities.