The problem is that it's actually very unlikely you'll wind up with a valuable product. The odds of getting on a user's home screen get longer every day and if you're not on the home screen you might as well not be on the phone at all.

I would like to see Swift eventually become a general purpose programming language useful outside of Apple's niche but it's got enough baggage from its ties to UIKit & ObjC I'm not sure how likely this is to happen.