Adolescence is supposed to be an identity Schrodinger's Cat: multiple simultaneous states which eventually collapse into only one. The goal of adulthood is to let go of the other possible existences and to make the best of the one. A successful adult is one who understands that it doesn't matter which life you ultimately pick, only that you live it well. The same potential for, say, happiness exists whether you are a construction worker, porn actor, or wealthy industrialist.
The Last Psychiatrist, A Surprising Number Of Teens Think They'll Die Young, Or Live Forever, Whichever Comes First