My problem is that I would rather be neither, pragmatically speaking; my current responsibilities require me to be more successful than a bum, but I could never give up my imagination.
The other problem is, though of course a bum with a dream sounds more spiritually appealing, having just a dream is no indicator of future success. You also need to have the determination to realize your dream, or a whole lotta luck, otherwise you will remain a bum. That, for me, is unacceptable.