I used to believe strongly in the US dollar someday (soon) crashing into "mega-hyper-inflation." But I'm not so sure any more.
The main thing that changed my mind was learning about Bitcoin and what gives it its "intrinsic value."
The reason bitcoin has value is because it has great utility - in the present, and especially in the future. The US dollar also has great utility. It's the most accepted currency on the planet.
Now things like the OP posted will, of course, reduce that utility. But it will take a long time, and a lot of things like the above to turn the dollar into a useless piece of paper. Don't get me wrong, the dollar is going down significantly in the near future, but I think it will be just a big hit like Mt Gox was for Bitcoin. We can blame Mt Gox for cutting the value of Bitcoin in half and the Chinese "banning" for some more droppage, but it didn't kill Bitcoin and I don't think the things coming down the pike for the dollar will destroy it either. Of course those drops in value with the US dollar will be permanent unless policies dramatically change (ha-ha), where Bitcoin will continue to recover and move up in true buying power.
You are confused about what gives money value. That dollar is the most accepted currency on the planet is correct, and that is the hallmark of good money. The best money is the one that is most accepted. But that is now. If the money's value continues down its slippery slope, and if there are alternatives, it will not be the best money, and it will not be accepted to the same degree. So the causation relation is the other way: Good money is accepted, and the quality in question is the long time value, the other money qualities of the dollar is OK.
The inflation expectation, a favorite parameter for the central banks to measure, is about 2% yearly for dollars. So everyone integrates that number in their calculations and happily chug along. You could say that the value of the inflation adjusted dollar is constant. But we are talking about expectation here, and that is something that is in the mind of the actors, and everybody on the planet have the dollar value in their mind. The problem comes when all these people modifies their considerations. It is not up to the central bankers, all they can do is to present their "puts" and hope. The real reason for the value is the supply, which we know is increasing, and the reserve demand from all actors, a parameter that depends on the expectations for the continued value. A positive feedback loop.