These projects which you say. I hear a lot of people talk about them and care, but I like the best Bitcoin. Because Bitcoin goes up, the projects you mention will be more successful. Bitcoin is the most potential.
I like DeFi, but I don't use any of the projects currently. The interesting part is that they are building infrastructure for the future that can change the way we use finance. And if DeFi dies down, that's okay to because it will spark another crypto movement, and we will keep getting closer to getting adopted.
DeFi lending etc. can be extremely risky, so I wouldn't recommend anyone buy it unless you know what you're doing.