Everyone has wanted to be something big at some point. About all of us forget about that. We settle, because we tell ourselves that we don't have the time, and we're happy enough where we're at, and it's too damn expensive. But life's too damn short. No job, no house, no car, no amount of money is worth living a life that you wouldn't have smiled at as a kid. Nothing is worth putting aside what you have always wanted to be.
Don't settle. Don't tell yourself whatever you have is good enough. Don't just dream, do it. You'll always regret the chances you didn't take, and the big things you didn't go for, and you'll never smile about settling for whatever, just because it was OK for everybody else. Please don't play it safe.