Indeed, how many people in the world are rich enough to buy an Apple product with its associated high margin? A billion? That's about how many iOS devices App

Indeed, how many people in the world are rich enough to buy an Apple product with its associated high margin? A billion? That's about how many iOS devices Apple sold to date. Can it keep growing at 30% a year? I think it will simply run out of new customers and out of new products that will sell like hot-cakes.