[Barrin92]

Sure you can conceive of a crypto currency that is centrally controlled, targets inflation and focusses on price stability, but then you have simply invented 'crypto-fiat'.

The key point is that Ponzi schemes you are talking about are not an accidental byproduct, they're the entire point. There's no reason to reinvent electronic banking, we already have electronic fiat money that works very reliably.

Cryptocurrencies are digital gold and basing an economy on them would be like bringing the gold standard back. The problem being that every economist will tell you, for good reasons, that this is a terrible idea. Cryptocurrencies are not a technological innovation, they're a technological regression. They make things that we already can do more complicated and energy expensive which is the opposite of what technology is supposed to do.