Ok, wat u say may b somewat true, but the reason they still have those edges is not because ppl r used to it, but because some ppl need it. Blind ppl that is. it's how they can tell wat coinage they have. If u've ever seen Daredevil he folds his bills differently according to their worth, so he can find them later. same thing with coins, except it's kinda hard to fold a coin a certain way :P. anyways, there's the truth of it