Collectible coins are often categorized by their historical significance, rarity, condition, and demand among collectors. The United States Mint produces various collectible coins, including the 5 Dollar Gold Eagle, which features an iconic design and contains a specific amount of gold. The 2000 Philadelphia Mint produced a limited number of these coins, making them sought after by numismatists. The Gold Eagle series is popular due to its intrinsic value and collector appeal, often appreciated for both its craftsmanship and investment potential.