Some spare change can prove incredibly valuable. Check your pockets for some of these rare and valuable coins.

Here are 10 rare coins, including five still in circulation, that are certain to increase in value in the next five years.

Coin experts say people may want to hold on to some pennies, though they likely won't be valuable any time soon.

The coin, part of a series called the American Innovation $1 Coin Program, was created for Texas and NASA’s mission control.