Not everyone could write a book or a novel.
It can be of many reasons, such as not enough time to invest, having other priorities, etc, and most probably, just not good enough to be a writer @ lack of talent.
However, everyone can have an idea of what their own stories would be like; how it'll start, how's the middle part, and how epic is the ending.

If you could write a book or a novel, do share with us what will it be like
Who knows, by sharing the idea and getting some feedback, you might be interested enough to actually start writing it, and maybe one day finish it & publish it