Gold backed currency is overrated If you disagree with me you can go and convert your savings into gold (but you are probably doing it already) Remember, you still need US dollars to buy oil. http://en.wikipedia.org/wiki/Petrodollar
"you still need US dollars to buy oil" well as long as the oil producers are happy exchanging the world's economic lifeblood for paper IOU's which Ben Bernanke is devalueing as fast as he can. I wouldn't bet the current situation will continue much longer.
You can be sure they're still happy, especially producers like Saudi Arabia and Kuwait (and Canada, of course)
Can they replace it? Sure, but there may be collateral effects, the harshest ones including 'Democracy delivery missiles' to said country.
"which Ben Bernanke is devalueing as fast as he can"
No problem! Barrel of oil yesterday was $X today it's $X+Y