How will the electric utilities—and the solar energy-producing homeowners—evolve to serve this fleet of electric cars? And ultimately—when will I be able to summon an autonomous car with my smartphone, tell it to take me to my destination, and exit the vehicle upon arrival, all without dealing with a human? The answers to these questions are still unknown, which means there’s a lot of opportunity in this market, and that’s one reason the readers of my Cabot Stock of the Month are still holding onto Tesla, with profits exceeding 750%.