Maybe they did, and they probably re-invested their money in more mining gear and when it all goes bust, even more laughter!
ooooh it's gonna be great. 290s for $290
I could see it going bust, but only if bitcoin and other cryptocurrencies were a pyramid scheme type of thing, only popular among miners.
But now that companies are allowing bitcoin transactions, why would this go bust? The company wants to transact in bitcoin because it adds 2-3% profit to their bottom line, that would otherwise be paid to Visa or other credit card vampires. Why not keep that money? Customers want to use this because it's going to save them money too. Win win, except for the middle-men vampires like credit card companies that are just a net drag on the economy.
But back to the idea of prices. I'm curious if the high demand of AMD cards has hurt Nvidia customers too, by propping up demand for Nvidia cards, so that everyone loses out on cheaper cards?