Too many questions. Countless. But there is only one which says it all: The E Question. Yes, the Existence Question. It only morphed into a multitude of forms, appeal and relevance. But they have the same root of itch.
What am I doing here?
Who am I?
Who are you?
Where did I come from?
How did all things begin?
...and a lot more....
The question about existence comes in various ways. These questions basically ask the same thing, or express the same problem and expect to get the same answer. The answer being sought is hoped to finally end all questions. There is no bug as great as that elusive answer.