At the time, some of the top traded coins on there were NXT, BitsharesX, XCR and then things like DRK, DOGE, LTC etc. Wouldn't have got many DRK coins I doubt given it's price. I think most people consider LTC/DOGE "dieing" so they seem to overlook them, plus again with LTC, you wouldn't have got a lot of coins.  XCR hadn't even launched it's mainnet (the theft actually delayed it) so not like he could have stole that one. So really it comes down to NXT and BitsharesX.  I probably would have went for NXT as well since BitsharesX is brand new.  If you can believe anything the hacker said, he/she did say they believed in NXT.