there was bimetalism before, and still fractional reserve banking. A commodity backed currency doesn't fix everything.
The benefit gold has is that it and silver are in the Constitution, so anyone who wants different should have to amend the Constitution. Other than that, I think Ron wants a currency backed by a basket of mixed commodities with the market to pick the commodities. That is what he has said. But he would propose competing currencies as in his current bill. All this stuff about 'ending the tax code' and 'return to the gold standard' are to marginalize him, going back to first principles in an immediate leap. He has proposed a three year plan, and it would be a year before it went into effect, so that is the skeleton of his term of office. The media is just being disingenuous.