Collectible coins can be categorized into various types, including numismatic coins, bullion coins, and commemorative coins. The United States 1-cent coin, commonly known as the penny, is a popular collectible, especially coins from specific years like 1926. The 1926 Lincoln penny, struck during the early years of the Lincoln series, may hold significant value depending on its condition, mint marks, and rarity. Rolls of cents, such as those containing multiple 1926 coins, are often sought after by collectors for potential numismatic value and historical significance.