It's just people hopping onto the bandwagon at the very top. We've seen this with bitcoin, we've seen this with litecoin, with doge, and now with ethereum. It always follows the same pattern, coin is out for a while, but it suddenly skyrockets, gains lot of exposure in mainstream media and suddenly every Joe wants in. Ironically that is the exact point when it is too late to jump in as the difficulty goes up exponentially and stays up even if the price of the crypto (and profitability) goes down like it did with ETH. This is how you end up like that guy with 150 cards and no power to run them. And just like with the other crypto booms there is always delayed reaction to the crash and difficulty rise, people will keep on mining and adding capacity because they got the hardware and do not want to sell it at a loss, because they do not want to admit they effed up. I'd like for GPU prices to come down soon, but given what I know about past crypto booms and crashes, we will not see reasonable prices until the crypto revenue goes down below the cost of electricity. That is the point when most people will finally start shutting down and selling their hardware. I'd like to buy 580, but realistically speaking I do not expect reasonable prices until about a month after electricity costs more than mining revenue. That's when people will start giving up and flooding ebay with used hardware. I think we're still about 3 months away from that point.