The one drawback I can think of off the top of my head is that PoS is hyperinflationary unless block reward is reduced after every n blocks. You end up needing a Weimar Republic style wheelbarrow to haul enough cryptocurrency around to pay for a Pepsi... metaphorically speaking, of course.

And for you tossers that keep suggesting I sign up with Madoff (currently serving a rather lengthy prison term, as I recall) I am ASKING QUESTIONS TO LEARN MORE, NOT TO SHOOT DOWN YOUR PRECIOUS COIN. I am skeptical by nature and don't necessarily believe that every "fantastic opportunity" is, indeed, such. It probably has something to do with my mom dragging me to a timeshare sales presentation just so she could get a free camera.