Sounds like it's already happening - to quote construct "Some quick research shows a handful of big players in the mining market who have invested heavily in high-end GPUs for dedicated bitcoin mining, some with over 50 GPUs running 24/7 for months now. These guys are bound to have huge quantities of bitcoin they are eager to unload when the price is right. Meanwhile, news coverage is driving exploding popularity, which appears to be pulling the exchange rate sky high. On paper, many of these guys have become overnight millionaires just by running a bunch of computers 24/7."