this is not a binary situation. you can be a master of one, two, or even more things and still have a broad base.

it's also all relative and honestly just being happy with what you have, both in terms of material things as well as mental skills/knowledge is a good thing. doesn't mean you stop learning or earning but you don't have to be disappointed if you don't get x amount of dollars or a y number of square feet in your house or z number of factoids in your trivia database