“Find a penny, pick it up. All-day long, you’ll have good luck.” Or something like that, right? But why? Why will you have good luck if you swipe a penny off the sidewalk or discover one between the c …

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There are dozens of different ways to exchange currency now. From apps to online payments to debit cards. It is less and less common for individuals to carry cash around, let alone a penny. Even thoug …

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