I believe the main obstruction now is the complications of securing the money and finding practical applications such as Steemit. Many (I was one of these) was skeptical due to not seeing the practical possibilities for anyoen not big business coupled with the technical complications of storing the coins. It really was ingenious of Dan to come up with vesting to help prevent the immediate emptying of ones wallet if someone gets your key password, as well as making the address an easy to remember name and not a long string of characters. I imagine some of the upcoming regulations will attempt to address the security aspects I mention, although not really sure how they will without further making this a pain in the ass.