I think there is an important missing part of this argument that many of the current paths to move dollars around that network in the traditional system take either days to settle and/or cost quite a lot in fees. I see crypto having potential to optimize lots of things and introduce extra trust from a technical infrastructure standpoint. Right now my traditional money is sitting in several digital banks or brokerages that I have no idea how well made they are underneath, I just see a website I can interact with. Crypto doesn't solve problems about where the coins meet the real world, even a stable coin with publicly auditable holdings to back it can have secret debt leveraged against those assets. Those problems seem only possible to resolve with regulation as it has been with the traditional financial system, but standardizing protocols to move money around and reducing lead time and/or fees as crypto evolves could really help the financial system be more flexible. With everyone carrying around a smartphone it really should make us question why so much money needs to move through the major credit card networks, we don't need their special hardware anymore.