What if Chinese becomes the global language?

What if the Chinese become the global language, I think it is an advantage and disadvantage. Because I think I can go anywhere that I want, and I won’t afraid that I won’t communicate with others. And I needn't worry about the change project from the school that I can’t chat with foreigners. Then, if some guys ask you how to study Chinese, you can proud to teach them. When I go aboard, I will feel familiar, because I hear my native language.  But I think Chinese is difficult to learn, so if others want to learn may spend more time than learning English. However, I feel it will be boring because Chinese can’t like English that has many different accents. And I will lose the motivation to learn other languages since Chinese is the global language. Last, I think many people will want to move to Taiwan because Chinese is the native language in Taiwan and they can learn Chinese in Taiwan. To sum up, I don’t hope the Chinese become the global language.