I guess the convenience of money is that it doesn't even need to exist, they can just be numbers in an SQL table (other database types are available). Imagine needing to ship tons of rice when buying an RTX 5090. Or even buying a datacenter full of them. Nvidia or Apple would need giant silos for all the rice they have (or I guess there'd be Central Rice Storage, and a ledger to say who owns how many tonnes)

It's funny how too many of us are obsessed about keeping our number in the database as big as possible...

Hard to imagine, but maybe in the future products won't be physical either.