Everyone has the reason for study English or anything.But I think, Vietnam is integrating into the global in the period. Nowaday ,more and more foreign companies invest in business in VN . So we'll keep with social demand and labour market, we must study English to us widen knowledge.
I think, If we study good English, we can find interesting job in the future. therefore ,you can earn a lot of money from that job and improve yourself when you work in expert environment.
You can update news the world of the BBC,CNN,VOA...you learn a lot things such as working style, cultural, economics,policy....When you have a opportunity working other country, traveling, or living , you'll keep with new environment.At the moment, the books is interesting but it's only English language.And a lot kind of music is good as pop, rock, R&B, country...when you listen to understanding that music or watching American film and knowing thoroughly content of the film, you have widen knowledge English.
In study, If you want to use computer very well, you must have boarden knowledge English.Beacause, it programme by English language.
In brief, English is very necessary in us life, it is keys to open the better door in the future.