I'm sorry for responding here as it's against the rules and don't want to get banned but I want to point out that in one of his picture, he showed the guy discord # which is different by the d0minik discord # linked with his profile on nulled. So, I feel like it was an impersonater who scammed you.
I'll say keep for now. Bitcoin is not stable as it can reach to 8k within a day as such, keep increasing. Unless, you're scared of losing it all, could just sell it.