I never bought into that "commodity currency" business. If that is so then the U.S. Dollar would be the biggest commodity currency, no?
It is a philosophy with me to focus on markets that see a regular cash flow from people/institiutions who both have money and make money. Holding long AUDUSD at even 10 to 1 yields 35% annually. At 50 to 1 it's 175%. Meaning shorts pay the interest. There will come a time when the Aussie will top out, but I"ve a hunch that won't be till it "bubbles up" a bit form here. It is human nature for investors to go after that 35% at 10 to 1, so I imagine there will be no shortage of money going into Aussie debt just yet.
Today's commodity weakness will likely prove supportive for asset class markets.
There is no doubt risking one's money to make more money in a commodity or forex account is a risky, if not bad idea, for most people.