Throwing some quick numbers we have traded 14.8 million coins today that is something like 20% of the total 74 million... That seems way more than I would expect to be as liquid coins at the market. I think shorting this coin is very possible given these numbers no?
Here's a quick number for ya then... I trade with between 10K-25K BC and 5-15BTC (With the larger numbers representing values only when I'm 'all-in' trading-wise at least). Just myself I probably generated 100BTC worth of volume today in just 6-8 trades.
Considering the size of the guys that were playing in our pool today... I'd say more than one did 1000BTC worth of volume by themselves. It's pretty easy to do when you're moving 100BTC worth back and forth on the swings.
So I'd guess that there was somewhere closer to 8M total DISTINCT coins traded today. With at least 4M of those being held by fewer than 10 hands.