I read very often about DeFI dropping Bitcoin, but until now there is no way for it, DeFI is just talking nonsense, the proof is, Bitcoin price is dropping, DeFI is also following, and vice versa, Example: Uniswap, CAKE, LINK etc, it means that it does not have a good ecosystem for DeFI.
What you need to know is that Bitcoin was created as a cryptocurrency, while DeFI was not, it was just designed in the Bitcoin ecosystem to be able to use cryptocurrencies, it means DeFI can't do anything if crypto doesn't exist, don't get me wrong in judgment and you do something to DeFI, you can end up disappointed, maybe right now you still have good luck in DeFI, don't fantasize about DeFI.