This is nonsensical. Unless two games support some agreed upon mesh/texture format you're never going to be able to transfer your SpongeBob NFT into Call of Duty. Games aren't going to import foreign mechanics into their engines, a fantasy RPG doesn't have a way to use your Laso-o-blast 5000. A Magic card is useless in a game of Pokémon. Your Magic card isn't an unbeatable poker hand.
Digital scarcity is a problem looking to insert itself where no problem needs to exist. The world doesn't need digital scarcity. There's enough scarcity in the world already.
The marginal cost of digital goods is effectively zero. It's an anti-feature to try to push the marginal cost above zero.