There are no problems with digital currencies. We should abandon fiat altogether.
That's a bit radical and knowing the current state of living in almost every country, total abandonment of fiat is going to be impossible, how would the impoverished people exactly buy the needed tech to use for storing their wallet? Even if the government gives them which is unlikely to happen in third world countries, impoverished people are technologically illiterate so there's an unlikely chance that a what you're proposing could be successful right now.
The problem is that some people are too optimistic about Bitcoin to be the answer and solution to everything in this world whereas it was said to be an alternative and modification to the inflation problem which the government cant fix through fiat currency.