The basics of Bitcoin, yes, I have a good grasp of the theory, but technically I haven't learned anything, so that's why I'm here, to learn, and I think this is the perfect place.

Now, regarding DeFi, or altcoins, I understand why many of them are crap, and the truth is that they are, but I maintain that not all of them are, although 99% are. Even so, DeFi and its crap is great for diversifying capital and earning commissions without doing anything, so in that case, I like that crap.