English is a must today. My father was wise and had the right perspective of the future when he suggested I should study English as a main subject in Hungary. This provides a living here, though you have to work hard. But still.
Of course, the reason for English to have attained this role lies in tremendous colonisation. By today we have forgotten of the otherwise clever idea of the Chech Zamenhoff who created Esperanto.
We have to accept reality, which may change, but it is unlikely. I hope not in the way that the Chinese or Indians take over the lead in the world and obtrude their languages (how many?) on everybody on the planet.
English is beautiful, but Americans deteriorate it, they choose the simplest way to express their ideas, which leads to the simplification of the language. The language thus loses much of its beauty. I could give examples.
English poetry is joy to read, but it will never touch the heart of a Hungarian like many poems of Arany, Tompa (about expats) etc.