Even if the 'empire' falls, there are still very profitable pockets that will outlive your lifespan.
Look at the UK for example. London is still a major finance center. What is the total GDP of the 6 English native countries is another thing to keep in mind vs. the total GDP of the Slavic countries or the Chinese countries.
Don't learn a language until you actually have a requirement to actually use it professionally or personally. Otherwise your time is better spent on other things, like regular exercise, healthy eating and increasing your skill in your profession or working on starting your own business.
I tend to think language learning is one of those things that are intrinsically valuable. And, I'm embarrassed to have made it to middle age without fluency in anything other than English. From a pragmatic perspective it might not 've directly profitable...but it makes me happy.
Look at the UK for example. London is still a major finance center. What is the total GDP of the 6 English native countries is another thing to keep in mind vs. the total GDP of the Slavic countries or the Chinese countries.
Don't learn a language until you actually have a requirement to actually use it professionally or personally. Otherwise your time is better spent on other things, like regular exercise, healthy eating and increasing your skill in your profession or working on starting your own business.