-BTC worked well as store of value in the sense that there's more and more people that accept it as such. Data supports that it is being used in countries with unstable currencies
What is DeFi all about? Modernizing, disintermediating (banks etc.), reducing layers of fees in the middle. Transparency. This is a big misconception. People think it's opaque and used for criminal activity. Everything in blockchains is open...
A very hard unsolved problem, in fact, is how to make it private. The idea of using it for money laundering is absurd. It's the worst way to do it. Everything is public and exposed.