^^^
I would argue physical baseball cards are more like representations of fungible tokens. They are more like an erc20/xcp asset because Topps issues 15,000 (random number inserted) prints of Justin Verlander cards in its yearly set and they are generally worth the same as one another. The “conditions” of the card (MINT, NM, GOOD, VG) add a bit of fungibility similar to a “tainted” bitcoin or a ripped dollar bill you couldn’t use at a soda machine.