How about systems that don't involve stat backed currency OR cryptocurrency? Like using these amazing communication devices to connect needs with resources without involving the middle-man god $.
There's a nice paper you can read called "money is memory" which argues that keeping track of past transactions is actually a more effective way of allocating resources than using money/tokens. I've been figuring out how such a system would work in practice.
I believe that when we can more effectively and fairly manage reputation in the context of transactions (I'm not advocating some horrid "social credit" system that the Chinese government foisted on the country), then we won't need money anymore. That means no central banks as monopoly issuer of currency and I think the World will be a better place because of it.