I believe the Impetus was the German news 2-3 days ago about them pulling all national gold out of the US Fed reserve bank.
There is a pretty noticeable correlation between the Euro's loss and the Bitcoin's gain at times. Germans would seem to be jumping out of euro into the BTC this week, and if I'm not mistaken, a $200k buy order just went through since the Gold news. (Can someone confirm this?)
This could be the beginning of a very large rally. As the US keeps Gun bans in the news and the USD keeps getting watered down, we've got nowhere to go but up.