Yeah that is my biggest concern, shelling out all that money and then losing more hair behind it.
Yeah I'm in my mid 20's. I will most likely post a thread soon showing the current state of my hairline, I have some old pictures in my post history though. From what I know, no one in my family is a slick NW7. No one is really anything past NW4 I believe, but a lot do lose density and tend to flatten out around a NW3 or 4.
It really does bother me a ton and is something I think about a lot more than I care to admit. That's why I thought to just save up and get the procedure. Part of me is hoping some treatments will come out before my hairloss gets too bad, but the way things are going I'm not too optimistic.