Wow, I didn't believe it until I saw it for myself, but he's right. 
This is far more important than any price increase because it means the network is becoming more secure.
This is far more important than any price increase because it means the network is becoming more secure.
That chart is erroneous. It doesn't account for the change in blocktime and thus erroneously shows a hashrate that is twice as high as the actual hashrate.