For a while, big box stores like Target and Walmart stopped carrying trading cards of any kind because people were getting into physical altercations in the store and parking lot over Pokémon cards. People would go in and buy a whole display, then get jumped in the parking lot by people casing the place.

The shitty part is, these are scalpers doing the "buy for$1, sell for $2" way of making money. The cards aren't being bought by children who enjoy Pokémon. They're being bought by adults trying to make extra cash in a niche market with no regulations that's a complete black hole and a total void.