Collectible coins from the United States, particularly those minted in 2021 at the Denver Mint, often include various types of dollars, such as presidential dollars or commemorative coins. A roll typically contains 25 coins and is often sought after by collectors for its completeness and condition. Coins from this mint may feature distinct designs and are valued not only for their face value but also for their numismatic significance, rarity, and potential appreciation over time. Collectors may be particularly interested in those with limited mintage or unique attributes, such as errors in production.