Expect a big pump after auction is gone
It depends who win and what they do with their coins. If there are not many bidders and someone gets them dirt cheap they might dump to make a quick buck. If Tim Draper wins them all and holds then the price might not crash. He only won one small lot the last time though.
Well ,I doubt anyone who buys them will be dumping them, as the price will drop and he will lose money selling them. People who usually take part in these bids do so, to not buy that amount from exchanges, as buying will take the price up and they will be paying a large amount to buy the coins.