value of pokemon card Rare trading cards are outpacing Wall Street. Here's why At any time during your turn (before attack) you may K Pokemon Card Prices - CardMavin

That seems like a great place to start, why do you want to store your Pokmon cards

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Never clean with abrasivesonly use a clean microfiber cloth for light dusting

This image sums him up well

Topsun cards are still historically important: they came in blue-back and green-back variants, the prism holofoils are beautiful, and the ultra-rare Blue Back No Number Charizard (only ~50 ever printed) is one of the most valuable Pokmon cards in existence, with a PSA 10 selling for $493,230 in 2021

A Near Mint PSA 7 sold several years ago for about $80,000, but that's a long way off from $3 million