Unless you can prove yourself to have that $100k in your bitcoin wallet with signed message of that address, then it's just another complete bullshit.

On-topic: You shouldn't do that especially with strangers even if you "had" that big money. You should question yourself especially in internet where you can in danger if you vulnerable into that kind of attack especially in the internet. Would be better to learn by yourself so you know what is the sense of losses so you can fix that up and be a better person from taking any decisions.