Collectible coins from the United States, specifically those issued in 2022, may include various denominations, such as dollar coins, and are often produced at the Philadelphia Mint. A roll typically consists of 25 coins, offering collectors an opportunity to acquire a complete set of a specific coin type. The appeal of these coins lies in their potential numismatic value, historical significance, and condition, particularly from a renowned mint like Philadelphia, which is known for its quality craftsmanship.