Define greed. Is holding your BTC because you believe it has much more potential greed? I call cashing out an action of greed, where you want to take your fiat money afraid that bitcoin will lose value. That's the true greed.
Greed is buying and selling speculatively, waiting for the price to go further. And since more of the traders are doing it with this in mind, it goes up. When their cash dries out, what do we do?