Nope, I want to know how difficult it would be for sentiment to override the wishes of the big traders.
I think sentiment *could* easily override his cash supply, IF we could keep the pressure up through his sells.
One thing I have noticed after a big sell, and people start trading again, the price seems to trend up. If everyone could keep pushing, we could do it. He would then be forced out, or to buy back at a loss. And, I'm sure unintentional loss would be unacceptable to him. He loses some, but it would be small, planned, and controlled. These losses would be in sacrifice, to trigger panic, or to give the illusion of higher volume.
I would think it to be entirely possible.
For instance, a couple weeks ago, we were having a lower volume day (but not like the last few days). I bought 1 BTC which threw up about 10 ticks on Goxlive. Bought another one a few seconds later and had about ten more ticks across the screen. Then someone put a buy in for 30 or so coins, and I bought one more. Immediately after, someone plowed through the asks to the tune of around a thousand BTC. Now, it may have been coincidence, but I like to believe I triggered a panic buy with three BTC.