Trump is taking a calculated risk with extending US dollar dominance. It's the only way a nation can be a superpower, footing the costs of a massive military, high quality of life, and super low taxes - yes, all 3. The alternative would be to scale down the military, increase taxes, and boost public spending. That's what the British Empire did when the USA took over. Next up would be China. That's horrifying, or not such a bad idea - depends who you're asking. If USA wins in Iran (meaning secures favourable terms on oil), we will see Pax Americana extend for a couple more decades, and maybe have US Treasuries rated back up to AAA. Otherwise, we will see the gradually-then-suddenly collapse of the US dollar. As with any power vacuum, the suffering in the world, and especially the Middle East, will be much more widespread. Israel will continue to have (and create) problems, unless a two-state solution for Israel and Palestine somehow actually works.