Take a breath and look at things in perspective for a second.

Only 3 mil got sent to exchanges. No dump yet (that doesn't mean there won't be one) . But i do want you to consider one possibility: could he have sent those coins to exchange wallets so that the coins are safe from the possibility of our white hat friend getting hacked himself? It's just a theory... until we get more info all we can do is speculate. I just find it interesting that only 3 of the 7 got sent to the exchanges.