As you know English is spoken everywhere all over the world. English is the language of business and communication. If you go abroad and you know English you'll be able to explain your thoughts fluently. Besides this English may be useful to make your career in future. There is too many information in English and at the present time of developing technologies you 'll need to know more and more. To say in another way the more languages you know the better for you and your IQ will be higher. So learn and study English!