leave your "millions of pesos" in a Paypal account & tell the ATO nothing at all.
Not worth putting into an Australian bank a/c as lucky to get 3.5%, which you then are meant to pay tax on.
If you need funds here to pay for a house or whatever. Get an offshore loan from yourself in disguise of course as XYZ corporation from Bermuda or some other tax haven. (they still exist) despite what ATO might want you to believe.