I'll trust you on that one.  Bitcoin personalities are among the things I'm extremely ignorant about, just like politics.  I suppose I should care more, but I just don't.

Ah, rumors.  Those are the only things I know of besides actual news that affects the price of bitcoin.  Also, a link for this particular rumor would have been a good thing for you to provide, but people don't seem to have that much courtesy these days.

In addition, anyone who holds that much bitcoin would be insane to dump it all onto the market at once--unless they're hellbent on not maximizing their potential profit.  Mutual fund managers who sell big blocks of shares in a particular stock don't usually sell it all at once; they sell it in smaller blocks over a period of time so as not to overwhelm the buy orders and thereby drive the price down. 

I tend to think this is a load of horse hooey.  I'll believe it when I see it.