Not all old coins or dollar bills are unique, but some could be worth thousands of dollars. And if you do have old currency ...

With its storied history and relatively scarcity, the coin is a prime candidate for investment. As Ted Ancher from APMEX said, coins with low mintages or low survival rates typically yield ...

According to Ted Ancher, director of numismatics at American Precious Metals Exchange, Inc. (APMEX), coins typically last a few decades in circulation, while bills only last a few years.