his marks one of the best runs in recent memory and appears to have been spurred by increasing worries over a Greek exit, or Grexit as its sometimes called.
I'm not convinced it has anything to do with this. People always seem to look for some economical reason in the real world like this when bitcoin spikes, though I think people sometimes believe it to be the case so buy more thinking this time it's going to moon which then obviosuly has a knock on effect so it ends up being a self-fulfilling prophecy lol.