It is more beneficial to learn English than Mandarin
There are more speakers of English as a second language in China than in any other country. English is so widely spoken elsewhere as well; is there any point in preserving or learning another language in an increasingly globalized world where collaboration and mutual understanding are so needed for progress?
English remains more beneficial for economic opportunities and for practical reasons. There are more Chinese people learning English than there are English speakers learning Mandarin. There is a decline in US students interested in learning Mandarin because of the limited payoff. Some students have reported that the effort to learn Mandarin is not worth it because even if they are seeking employment in China, they find that many Chinese people in their job sector are already fluent in English. Language differences in business or political settings can cause misunderstandings and will hinder progress. It's much easier to communicate in English. For English learners, the difficulties and time needed while learning Mandarin are not worth the payoff.
As instant machine learning translations become quicker and more accurate, the need for a global lingua franca may diminish. People may be able to communicate freely in their native language with speakers of other languages, aided by instant language translation.