I will let the idea about trying grow a bit and will update you with final outcome
Why I think that it was you that paid and not some guy that you work with. By reading some of the post you've mentioned and being asked to deposit just to get your potentially earned money there is already suspicious.
I made the account for him and he sold it to a third guy..so basically I won from all of this but the guy who put the 19k inside stopped answering at all
If you happen to skip them and never got them any deposit from you, I'd say that you successfully escape from their scam trap on that fake exchange.
Well, to say that you've won with this situation and got the other person into trouble isn't a victory IMHO.