I was just a victim of hacker wallet (MEW), is there any way to overcome it, or find out who this person is, or can we recover what has been stolen .. ?? 
Anything loss from crypto's are impossible to retrieve back but you can trace the hacker by following his transactions and see on which wallet is the end point to his transaction. Anyways how come you have been hack by the hacker? did you log in on some phising site around? put your private keys anywhere? or your computer have malwares? maybe you should check on what is the root of the problem so that you may know some ways on what is your lapses and you can avoid it for next time around.