The Aussie dollar will not get worse this next 2 years minimum, if anything, the aussie dollar will get back to the $1.12 to $1.15 it was and could even get better against the greenback USA currency. It

Phew that's a big call.
Europe/America will continue to deteriorate, demand on China/Asia will fall followed by no more new holes in our great land as demand for resources, except oil will decline. Then construction here will almost come to a stand still. GFC on a larger scale all over again.
MAYBE !

Natural or man made disaster of EPIC proportions. It is said this improves the global economy, to an extent it does but too many variables to predict.
Very Possible !

I predict we will be hit the hardest if such a hiccup occurs as we contribute bugger all to a global economy and rely too much on our mining/natural resources boom.
Unfortunately all other countries are buying up our land on a MASSIVE scale and farming them to feed their country. Luxury items like pinball machines etc. will dramatically drop in price.
Just like we are buying all these luxury items very cheaply from around the world now. This very sheltered insanity we live WILL end, not if but just a case of when?

I say if you want it and can afford it - BUY IT and enjoy   we are a long time dead and we put too much emphasise on money it means SFA in the long run.