Is the tenuous edifice that is the main other attraction of Bitcoin, lack of government manipulation.
The thing is, it's very difficult to believe that it will hold forever.
Governments eventually will strive to have a certain extent of monitoring ( which means control) of the currency.
Even the internet, with the free speech paradigm, is now seeing some onslaughts by governments in certain degrees by certain states. Be it monitoring, filtering or even prohibiting content.
The question is, how confident can I be concerning Bitcoin in the long term? Or is Bitcoin usage is just a short term Forex investment?
Bitcoin is out of the shadows and it's no longer used just by SD and silkroad merchants it has some actual users for legitimate purchases.
Even government trying to regulate it will not kill it , but rather attract more users who still thinks it's a shady biz.