Last few months bitcoin and some alts risen dramatically. So who really caused the big movement? The average people? If average people moved them this far how dramatic would be the movement after big banks join in?
First jump was when US SEC identified BTC as a currency.
Then Chinese government decided that BTC is no good for its banks so that brought the price down.
The current rise is because of all the interest I gather. Not too sure..
Overstock.com just accepted BTC as payment last Friday. So.. now the trend starts for online retailers, then we see BTC to the moon and the alts follow suit shortly thereafter. (I hope)