Deutsche Bank Is Crashing Again: Why One Hedge Fund Expects Much More Pain For European Banks, page-60

Australia has only around 80t reserve. So probably they won't take it. Worst case scenario they just simply nationalise gold miners, they produce 300-400 t per year I think. But buying & selling gold could be illegal.

The other thing they can't take is land, beccause that's for population settlement. Land is also some form of hard asset safe heaven, which can't be stolen/taken.