Collectible coins encompass a variety of types, including ancient coins, historical coins, and modern numismatic issues. In the context of the United States, collectible coins can include early colonial coinage, such as the pre-1776 state coins issued by various colonies. An example is the Pine Tree Shilling, minted in 1652, which is one of the earliest forms of currency in America. Collectors often focus on factors like rarity, condition, and historical significance when evaluating these coins.