If the numbers you put out are accurate, then yes, it's uncharacteristically large volume. I just don't really see it as being a sign of something sinister on the horizon, as it were. Ever heard of Pirateat40? Ran Bitcoin Savings and Trust. Infamous. Accused of a massive ponzi scheme. I don't follow it really, but for weeks or months he's been dodging law suits and paying out small portions at a time (he says to avoid unhinging the market by dumping all investor's coins at once or something like that). I think he was sitting on 500k BTC or something. Was some big number anyway.Maybe he got fed up and liquidated. Who knows. All I'm really saying is that the cause isn't obvious to me, but it doesn't look terribly suspicious. Unusual perhaps, but I don't see any reason to head for the nearest bunker.