except for extremely remote markets

all prices come back to USD

its not that those USD prices of euros or whatever don't change of course

but that remembering they are USD prices is important.

so if its USD/EUR or JPY/GBP or Gold/Bitcoin or whatever

and that proportion changes in favor of gold (all fractions are proportions)

its because *the underlying US dollars preferred gold over Bitcoin for some reason*

the same for JPY/GBP or whatever you like.

its a simple thing with profound implications.