I disagree. The biggest hurdle is that the use of Bitcoins as currency probably either already is or will be made illegal. In my country I'm pretty certain it'

I disagree. The biggest hurdle is that the use of Bitcoins as currency probably either already is or will be made illegal. In my country I'm pretty certain it's already illegal (there are some provisions regarding electronic currency). It's even worse in countries with exchange controls (like Argentina). Edit: our laws are so badly redacted that Linden Dollars, Facebook Coins and all that are probably illegal as well, but nobody cares, unless they get popular. The fun of selectively enforced laws ...