Freelancing VS Startup

I am a full stack programmer and have been freelancing for over 3years now. I started in my third year in school, have worked at two companies and last year i realized that there is actually no future in freelancing. My colleage and i have this startup idea and we already have potential investors but they have not given us anything yet what you suggest should i quit freelancing totally and focus on my startup and develop it full. NB: Freelancing is my current source of income though i have savings. I don't see any programmer making it big as a freelancer.