If you are looking for a way to retire early and live the big life, then keep reading. Investing may not be the first thing that pops into your head when thinking of retiring early, but it is one of the best options. If you have looked into investing, you have probably heard things like stocks, bonds, day trading, and so on, but what you may not have heard of is ETFs. They aren't the biggest player in the investing world, but people...