I’m sorry, but you’re describing an open-source, decentralised, peer-to-peer, permissionless digital payment network. Which is exactly what cryptocurrency is.

I didn’t say peer-to-peer or permissionless, but that would help. Anyway, yes, those are all things cryptocurrency is, but they are not cryptocurrency. They are a set of design requirements. Cryptocurrency is not necessary for those requirements. There are other ways to potentially meet those requirements, which could be better than cryptocurrency.

This isn’t to say cryptocurrency isn’t the right solution for this. It might be. I don’t think the limitations are as impossible as you do. Sure, costs for running the network would be higher, but what’s the cost for running Visa? I have no idea, but I’m sure it isn’t free. Cost is just something that has to happen. There could be a donation funded foundation that runs it, or it could be funded by a portion of each transaction, or something else. Costs are a hurdle, not a barrier.