Collectible coins encompass a variety of types including commemorative coins, bullion coins, and numismatic coins, each appealing to different collectors. The United States offers a range of collectible coins, such as the Gold Eagle series, which includes a 5 Dollar coin made of one-tenth ounce of gold. The 2009 Gold Eagle is particularly significant due to its limited mintage and enhanced design, making it highly sought after by collectors. These factors contribute to the desirability and potential value appreciation of such coins in the marketplace.