Don't ever believe anyone that tells you a stock will go up every day. Also, AMZN is what is known as a "momentum stock" or a "bubble stock". It's only a matter of time before it goes down a lot and quickly.
I noticed that too. A few times in the last few days when I would take a look at the stocks that I follow, AMZN would be at 666 point something. Kind of eerie, this mark of the devil thing. We'll see what happens.