Until or unless agreement is reached on that, debating other points is kind of a waste of time. You're not going to agree if you disagree on the fundamental goal of money.
I've personally gone over to the Keynesian/Monetarist side. IMHO the most important idea of Keynes by far is monetary velocity: that wealth is a verb, not a noun. To be wealthy is to have much activity. The desire for idle stores of wealth reflects a very deep and very ancient wish for a stability that does not exist in this world. In this world things are either alive, moving, and changing, or dead.
Austrians want "hard money" that can act as an inert store of value for the same reason the Egyptians elaborately mummified their dead and piled vast stores of wealth in tombs. It's a very ancient and unfortunately very misguided quest for immortality through stopping of avoiding time. It doesn't work. The mummies were just corpses, the tombs were raided, and with enough time the pyramids will be dust.
If there is ever any kind of immortality to be had, it will be by embracing change and using science and technology to modify our biology or even transfer consciousness and intelligence itself into another medium ("mind uploading"). Those kinds of sci-fi things would require immense technological progress, and that's far more likely to occur in a world of dynamic economic systems biased toward investment rather than stuffing money into mattresses.