There is actually massive symbolism behind coins left on headstones. You may have no idea, but it is more than simply tossing a coin a wishing well for good luck, and definitely more symbolic than finding a “lucky penny” on the ground and picking it up. In fact, this is one place that you should definitely never pick up the coins. They were left there for a reason, and they were meant to stay there. So leave them in place. Once you learn why they were put there, you’ll understand why.