This story has been always posted to create FUD. apparently Bitcoin is always been moving up and down, dipping and pumping, attacked many times and currently dragging down by other forces yet still it is recovering. Bitcoin is a bubble. It is always been a bubble BUT it can recover back to bubble. BURST then RECOVER.
I won't call it as a bubble. Instead it is the dynamics of the bitcoin market which has now become the heaven for the speculators. Because of this fluctuations and the dynamic nature of the bitcoin market, people from around the world is investing heavily in trading. The dynamic nature actually gives more trading opportunity than a stable market. So it is not a bubble, it's just the nature of the market.
Also I believe the entire bubble thing is pre-planned attack to bring down the morale of the crypto community and to create FUD. Don't be surprised, if we find out some big bankers names behind this bubble story in future. We just need to start ignoring such news for our own well being.