Also, these recent price rises are nothing compared to what will hit when mass adoption happens in 2014. It's all about perspective. Try to ''zoom out'' when thinking about where bitcoin will go.
http://blog.panampost.com/joel-fensch/2014/01/02/bitcoin-set...
I expect that until we reach a stable mining market when mining chips are deployed as soon as being produced, there will be quick accelerations in mining hashrate here and there. It'll be volatile like with BTC price. I take the risk that during such volatility there won't be a Big Evil guy to step on everyone's dreams, even if it causes big troubles only temporary.
That's the thing -- I haven't formed a conclusive opinion on this yet. I was hoping that mining self-regulates to an extent that pools don't reach >50%, or that a majority pools is really transparent and trustworthy. GHash.io isn't.