There are still a lot of problems and as stated in this article, we need some killer apps.
http://www.washingtonpost.com/blogs/the-switch/wp/2013/12/09/heres-why-volatility-isnt-a-big-problem-for-bitcoin/
I want to ask HN about what apps/services/infrastructure would be needed to make bitcoin happen? What would the ideal bitcoin landscape look like from mobile payments to saving accounts?