He wants people to buy into his BS so that they'll switch to his alt(?)coin, which will return him to the power he had back when he was part of the Bitcoin foundation and actually slightly meant something in the Bitcoin economy. (I do not know if he was on the foundation board but I would assume he was).
The price is high because of confidence, and this is one of the most easily exploitable emotions in trading, and especially in the Bitcoin economy.
Just ignore him and let him spew whatever he wants, no-one cares about him anymore. He's washed up and trying to feel important again. Don't give him that luxury.
I share the same opinion on this matter. Though I wouldn't say that Mike Hearn is a retard because he obviously is not. But he sure looks very disappointed, and the kind of disappointed that, as someone said earlier, seems to make him want to destroy what he can't own.
Now about the news itself I would have sold if I had known about it earlier, and maybe I should still now, but only to buy back when the price has gotten lower. Confidence is here. Bitcoin is still there, in a form that doesn't satisfy everyone but enough people to keep the value above certain prices.
Now I don't know the future. That piece of news could still have more impact on bitcoin than it has had until now (a $430 to $415 drop is nothing) but it will not kill bitcoin. Let's stop and be realistic a minute. In fact, if the price drops back to $400 because of this piece of news I might just buy like crazy.
There's just one thing that bugs me inside Mike Hearn's blog post:
Think about it. If you had never heard about Bitcoin before, would you care about a payments network that:
Allowed buyers to take back payments they’d made after walking out of shops, by simply pressing a button (if you aren’t aware of this “feature” that’s because Bitcoin was only just changed to allow it)
I can't think of any reason why he would lie, so I'll just go with the assumption that he's telling the truth. Also, I can't think of a reason why developers would take such a decision lightly. In fact, if such decision was taken, it has to have some good sides to it. So now, why did they take such a decision? No matter how I look at it it looks extremely stupid. I can't think of any good reason. Does anyone know more than I do?