It's a potentially worthwhile pursuit! Bloggers are much more reputable among people than, say, journalists, because their unbiased opinion can sometimes be harmful to the business that would otherwise acquire them.
If you take a closer look at bloggers they also get paid quite frequently. If they have a lot of followers projects just reach out to them to promote their coin.
Of course they are . But for me it's clear that noone will subscribe your channel if you only post videos about coins .