K-Pop is hot, and I think it will become even hotter worldwide as the years go by. We'll see what happens though.
Also, the comment about Koreans in K-pop all looking the same was incredibly ignorant.

I have no idea what groups you've been looking at. Also, the part about 40 members in a group? You must be thinking of AKB. There are no groups in K-Pop that have over 40 people.