Korean is believed to be a member of the Altaic family or language isolate. Together with Korean and the Jeju language (spoken in the Jeju Province and considered somewhat distinct) form the Koreanic language family. Grammatically Korean is very similar to Japanese and about 70% of its vocabulary comes from Chinese. It is the official and national language of both Koreas: North Korea and South Korea, with different standardized official forms used in each country, also recognised as a minority language in the Yanbian Korean Autonomous Prefecture and Changbai Korean Autonomous County of Jilin Province, China. It is also spoken in parts of Sakhalin, Russia and Central Asia.
No language is bad to learn.
It is only your reasons or your necessities that determine whether learning a specific language has any meaning for utility for you.
An example if someone wants to learn Korean for the sake of speaking when they are traveling to South Korea for business or for leisure then doing a Masters in Korean is an absolutely bad choice. However, if one is trying to understand the Korean culture, their way of living, their ancient civilizations or their history then for certain learning Korean to the highest possible degree is recommended.
Korean is one of the most beautiful languages existing on the planet. Its existence is the result of a heartfelt need that was recognised by the Great King Sejong, who constantly thought for his people’s well being. Although it took quite a while for the language to be accepted by the courtiers, the language finally made it to the general public after multiple palatial circulars were circulated in the Korean language by King Sejong and successors in years to come.
Furthermore, if Korean is being learnt by a learner who aims to be a teacher, translator, interpreter, content writer, editor, proofreader then he must have the highest qualification in the Korean language. Other than possessing the highest possible qualification in Korean language, one must also possess additional requisite qualifications to pursue a job in an Embassy or consulate as an Ambassador, Consul or administrative staff. Korean language also opens up opportunities in areas such as import- export business,KPOs and BPOs, Hospitality industry, Travel and Tourism industry as guides, or work in museums or top rated hotels!