Earlier quoted context omitted.
The majority of people in the world can't get a credit card.
This argument does not help. Those same folks cannot carry around a crypto-buck either. There are plenty of mobile-only banking solutions that are widely used in non-western worlds, and that's likely a model for emerging economies. When electronic banking comes, OP is saying that standard banking ("perfected over millenia TM") is honestly quite preferable over algorithmic contracts.
Note: I am not a religious extremist, I have a traditional mortgage and an auto loan.