So the price is steady around 30/31. What happens on Monday when the difficulty should be much higher and the banks are open to fund dollar accounts? Thursday-Friday the difficulty goes up. The fact that this price is holding even with the blocks coming out at around 8/hour I would consider to be a bullish signal.
Incidentally, the difficulty increase will be the biggest ever in terms of size of the increase in the number from one level to another. With block 133,056 is increased from 877,227 to 1,379,223, or 501,997 in one adjustment. This one will be over 700,000.
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https://docs.google.com/spreadsheet/ccc?key=0AmcTCtjBoRWUdHVRMHpqWUJValI1RlZiaEtCT1RrQmcThe impact of what miners do with their they earn each day anymore (or do when no longer earning coins from mining) is becoming a smaller and smaller part of the bitcoin ecosystem. It's not a trivial amount, but at the same time it is not something that would impact the exchange rate a whole lot, at least not that I can see.
But a 25% rise in the difficulty just offsets a 25% gain in the exchange rate that already occurred. If it were temporary, that wouldn't be that significant. Because ASICs will only be coming faster and stronger, that's probably going to be the death-knell for those who stuck with GPU mining since the halving (and pay average rates or higher for electricity).
In other words, this is a significant jump in the difficulty for you as a struggling GPU miner. It is insignificant to everyone else.