Earlier quoted context omitted.
What currency is stable in value? Certainly not the U.S. dollar.
A better way to put it is that a deflationary currency is, counterintuitively, not a particularly good currency. The reality is, Bitcoin and similar, are not being used to actually purchase things. Not at any notable percentage. You're "best bet" is to horde it, and that doesn't make a good currency.
But most of the comments are about how stable currency and stores of wealth are actually bad! It kind of sounds like we think bitcoin is working.
If USD is inflating and Gold is staying still, is gold “deflating”?