A lot of my dreams have come true, although some have yet to be realized. I believe as long as we're alive we should have dreams.
I see a pattern in those who never realize their dreams. I have no statistical data on this, it's just something I've gathered through everyday observation. Those who haven't experienced the fulfillment of dreams are typically those who insist on taking the most convenient route all the time. They are the queens of store-bought cakes. Again and again they select whatever is easiest and won't require them to do anything extra or go out of their way.
Observing this is the main reason I've tried to take the road less traveled most often on my life's journey.