I am fairly sure that the price WILL stay above $400 this weekend. Is there a particular reason why it shouldn't? I can't see any. You are just hoping that the price will go down so you can buy yourself a few cheap coins before the price really start to rocket up. If you are dreaming about sub $300 prices, then good luck. 
I wouldnt be so sure, i can see it going to like 380$ pretty damn easy in a day or so. Sub 300? Probably not, but 350~ or so - decent chance.
Or it just could go full retard and blast to 480$ without any reason instead.