Purchase property as you normally would by paying deposit and other fees in AUD.
Once the property is in your name, pay it off by converting $9,000 AUD worth of BTC from your trading or exchange account to the bank account of the bank holding your property.
This way I think (not sure) that you'll avoid paying CGT on any crypto profits you've made.
You'll be paying off the property at 52 X 9 = $468k per year.