While Vitalik hopes there was no manipulation by insiders, and says he didn’t engage in such practices, he says ultimately he has no way of knowing whether some may have done it. As for himself, he barely had enough money to invest as he had spent most of it bootstrapping Ethereum. Incentives for early contributors to participate in the sale and get others to do so, and the unnaturally even chart patterns, point to possible manipulation during the ether sale.