Collectible coins encompass a wide range of numismatic items, including traditional currency, commemorative coins, and medals. In the United States, the U.S. Mint produces various collectible medals, which are often created to honor significant events, individuals, or themes in American history. The 2018 medals from the Philadelphia Mint feature unique designs, reflecting both artistic merit and historical significance. These items appeal to collectors for their aesthetic value, limited mintage, and potential investment returns.