Of course they are . But for me it's clear that noone will subscribe your channel if you only post videos about coins .
There has to be something special in what you create, not just narration of raw facts.
of course you need to find out some interesting information, maybe some unique facts that no one has told yet, but it's realy to create a good channel about coins if you'll also touch some stock exchanges and everything what is connected to crypto
Firstly, I didn't mention narration of raw facts is Ok.
Secondly, I'm hesitanting 'bout good channel advertising coins. I agree with you that your content should be interesting and inspiring. Bloggers have not another option.