For many currency collectors, the hobby is a form of investment. By acquiring rare or valuable coins and paper money, collectors can potentially see an increase in the value of their collection over time. This is particularly true for coins and paper money that are in high demand among collectors and are difficult to find.
Collectors typically acquire currency in several ways. Some buy coins and paper money directly from dealers or at coin shows. Others attend auctions to purchase rare or valuable items. Some collectors even trade with other enthusiasts, exchanging coins or paper money that they have duplicates of for other items in their collection.