Specialization is for insects.
Not for you. Resist spending your life knowing more and more about less and less.
Become as diverse as suits you. Become a double or triple threat. Not as a dabbler or dilettante, but to gain skills and competency in what interests and excites you. Why not combine and intersect those capabilities in ways that make you rare and valuable? Why not cultivate and leverage your skills in the same way that top CEOs and entrepreneurs do?
Why not be extraordinary?