Collectible coins can be classified into various types based on their historical significance, rarity, condition, and provenance. In the United States, collectible coins include commemorative coins, bullion coins, and coins minted for circulation, such as the American Eagle and commemorative state quarters. Additionally, numismatic coins, which are often valued for their age and condition, play a significant role in the collectibles market. These coins can be collected for personal enjoyment, investment purposes, or both, with their values fluctuating based on demand and market trends.