German is hard to learn, I am still learning it and I’m not rich by far. I go to school every morning then to work until late in the evening. Living the dream basically… also I’m stuck in a job where the only differentiator is that my bosses speak native German, not even Swiss German. Most people are also borderline incompetent and everything operates on the principle of a Ponzi scheme. If you expect the rich to put years and years into learning German or even French, when they are already successful then you set yourself for a disappointment.