Why this sudden surge? The Greek crisis has been ongoing for many months now, and there was no surge in demand for Bitcoins, either from the Greeks, or from the other Europeans. That said, I don't know whether this will be good for the Bitcoin sector or not. These people are likely to use Bitcoin as a medium to store their wealth. That means less people using Bitcoin for their shopping.
I'm totally cool w/ storing coinage as being one of the major focal points of bitcoin going forward. It's not like people spend from their retirement accounts. Frankly, until businesses that accept bitcoin offer discounts for doing so, there's no need to pay with it just to give them the upper hand. When they do provide discounts for using it or only take it for said products, then the reoccurring demand to obtain coins will be a regular thing. This is the main issue I have w/ merchants these days outside of their immediate cashing in of their new coins.