>

They can threaten it, but there really isn’t any other currency that makes sense. Perhaps selling to China directly in Yuan does but that doesn’t really hurt the US. No one outside China trusts trusts the Yuan more than the dollar, especially given the delay in releasing financial reports last year.  Everyone else depends on a currency with enough liquidity, so the only other reasonable choice is the Euro. Considering how strong the dollar is and will likely remain for the next few years, I’m not sure why the Euro would be preferable. If the Euro or Yuan don’t make sense, I don’t see how any other currency other than the dollar makes sense.
Sadly for Britain, Brexit has killed the pound. What a mistake that was.
This sounds like they are removing freedom from their oil. Some people don't like that. >

The US wouldn’t dare attack Saudi Arabia. The last time the US was there—as friends to launch an invasion against Iraq it got a lot of Islamic fundamentalists angry because a bunch of non-Muslims were too close to Mecca. They considered it an affront and one of them got a bunch of other fundamentalists to fly airplanes into buildings.
Attacking KSA is a good way to enrage a billion Muslims world wide. They’d see it as a neo crusade. >

The US doesn't need to attack with weapons. Arab culture is so flammable & passionate about everything and nothing. All it takes is a spark of internal debate about basic human rights and the whole country would implode. See Iran for reference.
Why do you think freedom of speech is so illegal in these places? >

Ahhh yes USA is such a bastion of freedom OMG. 
Basically two corrupt parties that have same policy towards everything and both controlled by corporations. Such freedom, much democracy. >

Yo, the US has deep, deep problems, but comparing our freedom and their freedom is fair. We have an archaic and somewhat broken democracy that still functions, and they have an autocratic monarchy. We both function, but SA doesn't even have something as basic as the 4th, 5th, and 6th amendments. Seriously, the number of new Americans I meet in my city, most would rather be here by far. Saudi's among them. >

US Politicians: Is anyone else smelling Weapons of Mass Destruction in Saudi Arabia? >

I wish this meme would die.
At any point during the occupation of Iraq the US never took oil. IIRC, the French actually had the most oil contracts with Iraq. >

Those Sadam gold bars were much easier to move >

That's what colonel Gaddafi tried to do >

And Saddam. And Iran. And Chavez. Only Iran is functioning (and not so much since they killed an innocent girl for not covering her hair)