NFT’s are crazy, but like you said, trading cards have a market. If it’s sports related, or an actual work of art, I understand buying an NFT. It’s the auto generated, generic looking crap I’ve seen people pay obscene amounts of money for that really blows my mind.
I don’t buy much that doesn’t generate passive income these days, so I’m out on NFT’s, but I do believe the sports NFT’s will be the most valuable in time.