This is most likely a single entity, and it has spent 10 million dollars just in November
What do you mean? Isn't this just SecondMarket buying?
It is assumed that SMBIT only buys BTC when some client buys their shares (10 shares = 1 BTC). If that is true, there seems to be a client who buys 2.5 million dollars worth of shares each week. But we do not know, really.