The key to the World: English
You can dominate the world with English which is regarded as lingua franca (Language of the World) nowadays. You can reach out to every single corner of the world by English which is accepted as the common language of the world.
Whatever your purpose is you can easily access every knowledge around the world by learning English. From a recipe of some country cuisine to critical information about your field of work, access to every source is possible by means of English. English enables you to communicate with anyone around the world regardless of their country, native language, religion etc.. English also ensures that you are one step ahead of your colleagues and competitors.