Shares of electric-vehicle maker Tesla continue to trade, mainly, on investor enthusiasm for self-driving cars.

Ten years ago, it was 2015 -- an eventful year. Nearly 200 countries agreed to reduce emissions and focus on renewable energy, Tom Brady and the New England Patriots were accused of underinflating footballs, and the Supreme Court affirmed same-sex marriage nationwide.

Looking for ways to invest in Tesla without actually buying TSLA stock? Check out these 7 ways to give your portfolio exposure to the electric vechicle maker.

President Donald Trump’s policies will impact the electric-vehicle industry. Exactly what will happen is hard to say.