I can't give you that one ---- the dollar is not based on gold, true, but it isn't based on any commodity. It's based on our soft power, I guess, and the fact that ours is the reserve currency; which won't last long if Russia and China have to develop their own banking exchanges instead of SWIFT.
Oil is a very important commodity, but so is wheat (bad crops expected from the major wheat-growing nation Ukraine this year ---); it's not the same as money. What are all the new digital currencies based on? Darned if I know. Faith, that's all that really matters, or ever did since money turned into paper.
Besides, Europe direly needs energy autarky, and wind seems likely to be the replacement in Germany, nuclear power in France. Nations are moving out of oil as fast as they can, and no wonder! Green energy: maybe it will work after all.