This article is 100% BS. Go anywhere in Africa, the Middle East, Turkey, or South America, the US$ is king.
Ask a man selling his used car, anywhere in the world, if he'd prefer to be paid in $, Russian ruble or Chinese yuan. Besides the Swiss, all the world would choose $.
I agree with your statement. If you want to replace USD with some other currency, then you need to have a suitable alternative. And look at the major currencies apart from the USD. All of them are in very poor shape. EUR, JPY, GBP and CNY have lost a lot of their value during the last 12 months. There are some powerful currencies in the middle-east such as AED and KWD, but all of them are pegged against the USD. CHF is one strong currency, but it is not used in a global scale. So for the next few decades, we are stuck with the US Dollar.