Are you passionate about product development within a confines of somebody else' company? Then it's definitely not a common passion.

If, on the other hand, you're passionate about software development and electronics, then it's a very common passion and you have to be in the top 1% to make a living out of your creations. Of course, there are subniches with various degrees of difficulty - it's easier to make money on some technically simple B2B SaaS than on consumer robots for example.