Isn’t this just caused by a weaker / changing AUDUSD exchange rate? Agree USD is debasing but not sure that’s the whole story.
Discussion
The "why's" of the strength of the AUD against the USD, or the weakening of the USD against the AUD (and most others) is (imo) a pointless discussion as neither of those two are fixed units .. they're both currently debasing so there's no way to comparatively measure one to the other over time.
With bitcoin however, same set of units, transparent, visible and verifiable