Ahahaha my dude its called currency. There's literally millions of them. In fact there's like 50 versions of Bitcoin.
Bitcoin is not infinitely superior. You clearly haven't thought about it well enough, otherwise you wouldn't be saying that.
Last I checked your fancy mining rigs needed gold to run, not Bitcoin.
also, you know you can wear jewelry or a Rolex or rings or whatever and go through the airport, jewelry being the original cold storage.
But you do you boo