Nowadays, many minority languages become extinct as the rapid development of society.
.... actually , it is not the rapid development, but rapid advancement of globalization :)
Some people believe that
it will benefitfor the
lifelives of people and society
would be more benefited with less language around the world.
As for the native speaker of minority of languages, it will be beneficial for them to speak the dominant language, for it will help them to gain access to more information about scientific and technological developments.
Well, this does not answer your prompt effectively. You do not talk about the benefit of letting your language die. You can learn and be conversant in the major language of your country, yet still keep your minority language alive. What is the benefit you see by extinction of the minority language? That is the question your prompt is asking you.