I believe that big dreams do not guarantee a great future. Everyone dreams. Only a few work hard enough to make their dreams their reality.
I also feel that failure and success is like building muscle. You wont become stronger unless you tear it to shreds. So dont worry if you fail over and over again - in time, you will be stronger than ever.
I am also certain that I will be financially independent by the time I am 30. Inshallah.