On May 16 of that year, Congress passed an act to usher in the new five-cent coin, made of 25 ... 20 nickels under your couch ...

you’re most likely to find the most valuable nickels in older, pre-World War I mintages. But as American Bullion noted, you can also find some pricey versions minted during World War II (1942-45 ...

According to Luxe Digital, this is the most valuable U.S. nickel in existence. Only five examples are known to have been created and just three of these are in the hands of private collectors.