there is no chance for identifying him. i think. i also lost a lot to this guy. when btc was 2-4 k usd. he didnt have an intention to pay it. i dont think he has an intention now when btc is over 50 k usd. i think he is now in his another scamming projects.
On the contrary, I think that now you and others can possibly identify him or at least find/ trace his moves. Ofc I agree with you that he doesn't have any interest to repay you.
But you should give it a shot...
The most disturbing thing about all this is that the scammer may have another account of good reputation, and be posting here as if he had never done anything wrong. this is the disadvantage of dealing with anonymous people in a public forum.
I saw that another big scammer logged in last month, I speak of this big scammer "@SNavy ":
https://bitcointalk.org/index.php?action=profile;u=485410DoubleBot.com - Always pays,100% guarantee. 195 BTC paid,more than 1 year online