There is nothing wrong with dreaming big. Many people throughout history have had big ideas that have managed to become reality. Dreams are pathways and goals the unconscious mind wants for yourself. Dreams can be anything, reach for the stars.
Things may seem hard but you should never underestimate your own power, determination, and wit. Your ideas are unique to you and what you can accomplish with it. Reaching for your goals may seem impossible but many have done the impossible.
Reaching space? Done.
Going faster than the speed of light? Done.
The Wright Brothers created the idea of the plane during a time thought impossible, now we use planes for travel and cargo.
Anything is possible if you set your mind on it. Dreams can take you far, making them into a reality takes effort and time. If you reach for the stars, you can be one yourself.