This cannot be said too strongly: there is no security anymore except in self-development. Continue to expand your skills and you'll be fine (at least, you'll

This cannot be said too strongly: there is no security anymore except in self-development. Continue to expand your skills and you'll be fine (at least, you'll have a decent chance). Allow yourself to stagnate and you'll find the economy passing you by. And, as others have said, entrepreneurship is a tremendous way to stretch yourself, to learn a breadth of new skills that you might otherwise never acquire.