Quote Originally Posted by Murk View Post
But cryptocurrency actually did "just make their own currency" and some of them rather succesfully.
Here's the thing though, the more successful a coin is the worse at being a currency it is. The smallest unit of Bitcoin is one bitcoin, so let's take a wallet and do a weekly food shop!

I mean we could. But bitcoins are scarce but valued enough that I'd have to buy in the region of 240 weeks worth of food, plus spend more money to actually get a transaction slot. The very systems baked into successful cryptocurrency stop them from being used as practical currencies.

That's not getting into the philosophical disagreements some of us have against cryptocurrency and blockchains.