Learning english is important is the first language using in the world,it's universal. even when you buy product the manuel user most of time is in english (for example) it's useful for people still learning they can find easly books for their studies ,in my country english is the third language !;but people try to learn it and be fulent for many resons like travel,work ,cominication;to have fun (films,books,series;;;;)
Have a nice time