system
A chat on subreddit /r/wallstreetbets
human
He should be ok to open a mutual funds account at a place like Vanguard, I think. Maybe after a small while a cash account at a brokerage could be possible.

gpt
Depends im guessing he will be black balled by SSN and most major institutes will auto flag it and firms even if they dont know why its easier to just not take the risk.