"US is, first and foremost, a financial empire"
Yes, America was a military empire and now it is a financial empire.
1970 would be the first date I can think of to date this transition, for lack of a better one.
The day the dollar falters, the Anglo Empire 2.0 will melt like sugar in water.
People just tend to see the currency only, not the financial traditions, ethos, and various systems, good and bad, existing and defunct, standing behind them. East and West have their own financial histories, traditions and practices that run very deep in respective social, cultural and political structures. A currency may come and go, but what stands behind them continues. They have been there since millennia before, each culture continuing and evolving on their own, or learning from each other when they can. Think of it as a common human endeavor, even though it's definitely wrapped in political power in the most exploitative sense. Not just the excesses and horrible headlines, but also the wealth of practical usefulness and applications. Of course, USD, or any other ones, past, present and future will ultimately fall in relevance; what matters is to learn what works in a specific circumstances, so that people don't suffer, just like before.