I feel like as long as steemit is marketed as a social media site that gives the value back to the users, then mainstream adoption will continue to happen.
As more people realize that other sites that they tried to build a community on are stagnating and placed in a stranglehold due to the very thing that monetized them, they will visit and bring their loyal followers as well. This leaves me to believe that we could see steem in the double digits in the not too distant future.