I, as Bitcoin proponent, was never insisting that this would never happen. The risk I'm taking as an investor is that if someone takes even 90% of mining power,

I, as Bitcoin proponent, was never insisting that this would never happen. The risk I'm taking as an investor is that if someone takes even 90% of mining power, they'd have little incentive to play dirty (and kill the value of their own savings as much as everyone else's) and a lot of incentive to play nicely. Of course, that's personal evaluation of the risk and I cannot promise to anyone else that shit won't happen. Everyone should think for themselves and vote with their money for what they think it likely to happen. 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.