https://en.wikipedia.org/wiki/Real_versus_nominal_value_(eco...
Concretely, there are only two utilities to crypto-currency: as a speculative currency investment hoping the value of a given crypto-currency increases disproportionately to a seed currency and as a means of anonymizing currency transactions. Until crypto is used for something other than day trading or illicit purchases most people simply don't care and won't ever care as its effectively worthless in a real sense.
Ponzi one is baseless (in this piece).
Volatility one is incomplete. Clearly people use volatile currencies. Usually people avoid ones that are in downward spiral. If he (or even majority) can not wrap their heads around the question of how to transact under current conditions, it does not mean nobody can.
It's harder/unlikely, but its not "no way to".
* [1] https://medium.com/opacity/bitcoin-1537e616a074
* [2] https://news.bitcoin.com/black-swan-author-pulls-a-180-nassi...
Bitcoin needed more than ever.