Great observations. (I had to laugh when you mentioned the petrodollar's "integrity".) My take on the US dollar is that it is the last ship to sink. People are fleeing to safety from their depreciating currencies. Yet, in the end, it will be the final fiat currency to collapse because it is just as unsustainable as all the others.
Some people might think this was planned. Developed economies have been over-extended for many years now. 2008 came and went - an instead of addressing the fundamental problems, they applied bandages and allowed them to fester. Western leaders and elites have no way out except default (which will happen if they keep raising interest rates) or extreme inflation. The elite will never choose default because they would be hated by the masses. ("Sorry, but you're pension is cancelled" is not a winning campaign slogan.) Instead they will debase the currency so that they can maintain payments. You'll still get your $1000 pension, but it will only buy a fraction of what it used to. The blame for this can more easily be retargeted. ("It's all Putin's fault. Those dirty Russians!")
At some point, debts will be wiped out, savings will be wiped out, banks will limit/stop withdrawals, etc. and then currency values will be reset, everyone's problems will be solved a centralized digital currency.
At that point, every single transaction you make - from a scoop of ice cream to the corner massage parlor - will be recorded in a central database. You will have zero privacy and the government will have zero transparency. Your money can be seized or restricted with the push of a button, and it will be for an increasing number of newly-created "offenses." Kind of like the way Twitter and Facebook capriciously suspend or shut down accounts. But instead of losing your social media voice, you'll lose your money.