A coin can be worth a ton of money -- a pretty penny, one might say -- if it's rare and has enough historical significance.

The half dollar is one of the most popular U.S. coins to collect. Though many aren't worth more than their face value, older half dollars often hold value due to the silver in their composition ...

The U.S. federal government officially holds 8,133 metric tons of gold. What’s striking, however, is that since 1973, it has ...