Novel or Screenplay

As I'm writing my novel, "A Quarter Ton to Kona",  I see that there is massive competition for resources in the novel space and it scares me a bit.  I really think my novel is a pretty inspirational story and that it could well help people make positive changes in their lives.  My fear is that the message won't be seen by very many if I stick with the novel format.  If I could get it made as a movie, I think it has a much better chance of reaching people.  I can actually see it in my mind as the movie plays out.  The scenes are perfect for the screen and it might actually allow there to be more subtle nuances than I have written, depending n the actors used.

I have other ideas that seem to play out in my mind as if they are on a screen.  I can see and hear the action and ambient or background sounds as well as see and feel the dialog. "The Elevator Story" also lends itself to that type of presentation.  I can see scenes and action and I think it might play out better on the screen than what I can write.

This brings me to my dilemma: do I continue to work on both of these, editing and rewriting them as novels, or should I look at them as screenplays and rewrite them as such?  Should I write the novels and adapt them to the screen?  I just don't know.  I'm more comfortable in the novel arena as I have read many, many novels, but never looked at a written screenplay.  That is my big hesitation.

What would you do?????