The whole process is flawed, the way you are proposing to invest in ANYTHING, not just commodities. It is just a short term bet, pure speculation on a gut feel. No analysis.
You think the dollar is done, Why was the treasury auction bid to cover so strong today? Or do you have the inside scoop with the central banks?
Why not foreign stocks, bonds or currencies? Why just commodities? Why not have a diversified portfolio and overweight somewhat in the areas you believe might do well. NO, this is all just a brilliant plan to make a quick buck by an obvious luminary who is beating the market and seeing things ahead of everybody else. You’ll be rich!