...
and is willing to pay a higher price than the previous sell...
Bob has wised up & isn't willing to pay more than the previous sell price. He's not even willing to pay as much as the last sell price => BTC price tanking.
Money is exiting the Bitcoin network

Right now it is true. cex.io stopped cloud mining, bitstamp has been hacked, the Dollar is strenghtening against all currencies. In Euro Bitcoin is still at 230 euros and things will change when the Dollar will tank and Bitcoin starts having positive news, a positive trend.
The future will look very bright for Bitcoin and the price will rise but it will be too late to make a big profit for those who didn't believe in it.