I didn't say anything about fiat currencies. I think we should also make a distinction between crytocurrency and digital money, since the latter has utility.

I didn't say anything about fiat currencies. I think we should also make a distinction between crytocurrency and digital money, since the latter has utility. Bitcoin is not decentralized either. It is in theory, but it requires mining which centralized naturally due to efficiencies of scale. It also requires exchanges to convert to and from fiat, and those are completely centralized private companies. Libra in practice seems to be less centralized than bitcoin in practice. People make arguments from theory, but those are not relevant to the systems in practice in the real world.