He might be able to find a lawyer who will fight the case for him on the basis he will only get paid if he wins. It is worth searching around because lawyers could be open to making arrangements if they are almost certain they will win. Again, as you mentioned it is about the country he is located in and also which country the case will be heard.
Please suggest attorneys who can sue them and recover damages from them.
You'd need to reveal your country for people to suggest. It'll also be easier if you're in the same place as the company you're suing.
Otherwise, you could probably find directories thru search engines. Some places have bar associations where you could get a referral as well. At the very least, I'd say you should get someone who's familiar with crypto/isn't hostile with it.