The "core reason" for cryptocurrency is to provide decentralized trust, albeit at very high cost. "Escaping inflation and control" is not the issue here; the real upside is to provide a baseline of control by market participants where there's currently none, e.g. in places without a functioning financial system.

Cryptocurrency is very niche tech at best, that most people will have zero use for - but it should nonetheless be available. The OP article does not account for this at all, and is thus extremely misguided.