Many of you were close when you talked about LoneWolf the Pickpocket, you just went wrong on focusing on him. The answer to the riddle is the old adventurer who gives you his treasure and then gets plundered by LoneWolf the Pickpocket. I figured it wouldn't be that hard since most people go after Mog or the Gold Hairpin most people would remember the old man. I guess I was wrong...
I'll give someone else a shot at making a new riddle.