If we were to follow that dream, they would change from a dream to become a true story and will probably be successful in life. But just imagine if possible, but not doing it is just your dreams only.
If we act on their dreams, these individuals will change from a dream into a reality and may not be successful in life. I could only think, but do not take action, it would be a dream for you.
If we do the dreams of these individuals will change from a dream to become true, and may be successful in life. But if you can only think but not practice it would be just your dream.