Learning some kind of Chinese language, like Mandarin, would be very beneficial. It is a language that has many speakers all over the world. Living in certain parts of the world, it could be very beneficial to learn Chinese and one can serve as an interpreter. Also knowing Chinese could be important for business and educational opportunities.
Chinese is an incredibly valuable language to learn. China is one of the largest economies on earth. Knowing Chinese will create an opportunity for you to be hired into hundreds of industries that need employees who are able to communicate in both English and Chinese. I can't think of a language that can make you more valuable in today's job market.