Anyone can be a bounty hunter, if you know about cryptocurrency. Well, here there is a lot of campaigns to participate too, but be careful of the campaign that you're gonna participate because it might a fraud one.
As long as he has what has already required to be participated into the bounty campaign and that very easy to join and just fill the form and then he can start to do his job in bounty campaign. I think that even a new comers can do that. He just need to try that.