There's nothing wrong with having your goals really high and trying to achieve them. That's the fun part. You may come up short. I've come up short on a lot on my goals, but it's always fun to try and achieve them.
We must have a theme, a goal, a purpose in our lives. If you don't know where you're aiming, you don't have a goal. My goal is to live my life in such a way that when I die, someone can say, she cared.