For Nem to truly succeed, it will needs to be innovative, and have a strong community that will push it, and create business for it.
It already has these!
If possible we also need to make it more than just money, for when the price stabilizes, people would want to join Nem even if they can't profit off of it.
Of the top of my head, if you have a certain amount of Nem, you can store 1gb of data. Or maybe access to a really cool website. I don't know.