The collectible cards with sports, entertainment, and gaming themes are the focal point of the thriving US trading card market. From its beginnings in the late 1800s, the market has grown to be valued at billions of dollars. Major sports leagues like the NFL, NBA, and MLB as well as entertainment brands like Pokémon and Magic: The Gathering are important participants. There is a thriving secondary market because collectors value cards according to factors including condition, rarity, and player or character significance. Its reach has been further increased by the emergence of digital trading cards and online venues.