Strange Zombie Behaviour II

Zombies are superstitious. We believe in any crazy idea that other zombies believe. Between many things we believe in, one is that we MUST pick up any coin from the ground as we consider that to be good luck. It doesn't matter what denomination or country the coin comes from. One must not leave it on the ground, as, first of all... it's... well.. money! and then... it is bad luck not to pick it up. Your money will end lost in the streets if you don't do so.
Ah!...and you are not supposed to spend that coin either... Believe it or not.