Its far from a bubble until McDonalds, Walmart, and Gas Stations begin to accept bitcoin......
Untill then, we have a long ways to go!
Buy and hold is my advice.
Who accepts the currency isn't the definition of a bubble. It is when everybody is making easy money that easy money will eventually stop and cease to be easy that is what bubbles are about. I don't think we are there yet either probably another year until it comes closer and we need to worry.