How Can English Help Me in My Future Occupation?

I want to tell you how English help me in my future occupation for two reasons. First of all, in South Korea, I can get a job better than someone who can't speak English, if I can speak English well. For example, when I was in high school, I really wanted to get a part time job. One day, my friend asked me to teach English and math to her brother, sister. Then I earned a lot of money and got experiences. In addition, I can learn more different subjects. For instance, I'v been learning English for university. And I had a lot of opportunities reading books to learn English. Therefore, I got variety subjects such as history of Europe, mystery of world etc. I also learned vocabulary. :)