Wise idea to stack more and hold, moving around all the time does not always provide growth.
As for the US$ there was a time when we traded in countries fiat on export/import, this changed early 1990's making the US$ become dominant in markets which I always said would backfire one day.
Going with EURO another wrong move made in early 2000's. Hedge funding along with inflation is driven all to enrich those who have.
My gut feel leans more toward technology change into cryptocurrencies, who knows it another can of worms is being opened, we can only hope to reach a happier footing, compared to this now archaic system, our world has changed people will have to follow.