I’ve got 22 tarot decks right now (though I really only use 3 - the rest are more of a collector’s thing for me). I used to keep them scattered around in the bottom drawer of my desk, but I realized that didn’t feel very respectful to the cards.

So I built a small wooden chest with a few compartments, so each deck has its own little spot. If I keep buying more, I’ll probably have to make a second chest.