Is being a super GP unattainable?

Is it possible to become a super GP but actually do good work and not be “ jack of all trades master of none”? I started practicing 2 years ago and I feel like there is no way I am gonna be good at everything. I am starting to think I should just focus my practice on one or two things in dentistry like cosmetics and refer everything else out. Should I just invest more into CE courses or this is normal line of thinking.