It takes time, but market-makers / liquidity providers can over time build up larger and larger piles of buy offers, eventually large enough to buy all the coins if all the coins ever got offered at prices the pile of buy orders had piled up to.
-MarkM-
Yes, good point. Its obvious to me that 'market makers' are keeping a lot of these markets from falling faster and further. And i'm sure there is good money to be made this way for the skilled, but at the end of the day you can't make a silk purse out of a sow's ear.
Use of malicious negative trust to suppress free speech discredits the bitcoin community