Given we are already introduced to big shots I wonder how long will NNT continue for.Its pretty popular and I guess it can easily go for 100 more chapters.Anything beyond 150+ chapters will be dragging imo.
The author said there is going to be 3 major arcs with 100 chapters each. But then again,he said he will continue the story as long as he has ideas. so it's probably not going to end in 300 chapters