Should I train for a new occupation?

I’ve become incredibly bored with what I currently do. It’s not a bad job, nor does it pay poorly, but I feel as though my talents are wasted and I’d like to make a better contribution to humankind. I’m leaning towards nanotechnology or genetics, as both of those fields appear to be on the cusp of producing some wondrous advances to benefit us all. Nanotech would likely be an easier route than genetics, given that I already hold an electrical engineering degree. Of course, I also have an interest in theoretical physics. Ultimately, I would like a profession that I enjoy, one that I look forward to doing everyday. Any advice or suggestions would be appreciated.