Many breakthrough technologies were hatched by hobbyists in garages and dorm rooms.
Prominent examples include the PC, the web, blogs, and most open source software.
While business people are mostly trying to create near-term financial returns. While engineers are mostly trying to invent interesting new things. Smartest people spend their time on pursuing their hobbies!
Breakthrough ideas often start out as hobbies. If you are passionate about a hobby, pursue it!