Bitcoin is the most secure network because it doesn't have smart contracts. Bitcoin's script language is on purpose very limited to prevent bugs, and as we know from practice, smart contracts often lead to hacks or bugs that make users lose money. There has been many hacks of DeFi since its introduction, so I believe Bitcoin shouldn't be a coin that chases hyped features, it should wait as long as needed, and only incorporate some features if they are truly useful and don't harm its decentralization.