Is luck cancelled out?

I got off the train yesterday and found this in my path.

Now, picking up a penny is lucky, apparently. But what happens if you see 2? And pick both up?

Does one cancel out the other?

I think it might have, so i only picked up one, leaving the other luck for someone else to enjoy. And nothing bad happened top me that day, so i think it was ok.

I like luck, it brings me happienss.

Off you go, back to what you were doing.