Another possibility: folks like your parent may be able to keep fighting this fight long enough for cryptocurrency to fall off the mainstream hype radar and the smaller, more knowledgeable, community driving whatever the future steady-state of all this craziness ends up being may actually coalesce on better language (something involving "blockchain" perhaps?).

I tend to think you're right that it's time to just sigh, shake our collective head, roll our collective eyes, and give up fighting this battle, but the future I just described seems at least somewhat plausible to me.