Plus if everyone doesn't choose the same it's less convenient.
If China ever replaces Xi and the next generation takes a softer stance on a bunch of stuff it'll be a shoe in, but right now they're weirdly belligerent.
As to shifting politics: The EU is famously extremely hard to move.
The European Council decides the political direction and consists of the heads of state of the member countries; the European Commission is the executive cabinet and needs buy-in from the Council of the European Union and the European Parliament; the Council of the European Union is made up from ministers of the member states and each member state has a veto right on all foreign policy proposed by the European Commission; the European Parliament's members are directly elected through independent elections in the individual member states with proportional representation, and any policy proposed by the European Commission also needs a majority here; the Court of Justice of the European Union's General Court oversees this and is composed of two judges appointed by each member state for a renewable six-year period and reviewed by an independent committee.
In other words: nothing gets done fast, and nothing gets done without buy-in from a lot of people with very opposed political goals. Quite different from a country like, say, the United States, where the loser of the popular vote routinely becomes president, is handed God-Emperor levels of power, and is virtually impossible to unseat - leaving the foreign policies of a nuclear superpower to be decided by how a single person felt when he stepped out of his bed this morning.
Will it? The Russians blew up an ammunition depot in Czechia without consequences. A cruise missile hit Poland and it was swept under the rug. Numerous acts of sabotage and Europe's done nothing. Now a drone attack in Germany and they're again, responding extremely weakly.
The only rational takeaway is that NATO is weak. If Russia attacks Latvia will the US go to war? Not s chance.
That's the plan, but under Glorious Leader? Not clear which side he would attack (or possibly neither).
Most international trade is already done electronicaly, so there would not much need to physicaly move gold.
Goverments don't like gold standard because they can't print gold.