People who sell their courses about finance/crypto because they claim they are experts are frauds. They actually know concepts and useful things regarding that world, more than the ignorant fools who buys from them (ofc many things they know are bullshit as well, more than the useful ones probably).
In the example, Zoro is the ignorant fool.
Mihawk is the crpyto guru.
Prets Zoro is still trash powerlvlwise, below a shitty Pacifista, so ofc he can still learn from Mifraud.
Can't you think up to this point? It's not rocket science!