I've been playing for 5 years now. In the next 5 years, I hope to be down to scratch (Well, better, but I've come to realize that being better than scratch probably isn't realistic...). Right now I'm a 5 handicap.
I don't see why in ten years you couldn't be if you're willing to dedicate yourself to practicing, and playing as often as you can for the next few seasons. And taking some lessons would probably help.