Stock market returns make sense only when you realize the currency is actually just losing value. All currency is being devalued so you don't see it in currency pairs but scarce assets go up quickly.
I think that given how vast is USD influence, currencies all over the world will lose their value with dollar. But not every currency, economies that rely on mining natural resources more should have their currencies better against USD.
This is not the case, as far as I can see.
Why would mining help? Resource extraction is the low end of earning potential. You mostly need the terrain and a willingness to pollute to break into it. It isn't that scarce. Industry makes much more than resource extraction and advanced services make more than industry.