Good to be honest man but if you see the user send you a message towards that accident sending you a huge tip then return it back directly to him but make sure he provide the address where he send the amount to you so that you can verify that he is the real one not the fake claiming that is his money. But anyways if you feel guilty for that amount better keep it for a while and wait for the rightful owner to contact you since primedice didn't share some vital information of their costumers to other people.