FWIW, I used to work with a bunch of former C level execs from Fortune 500 companies during the Internet boom. Those guys always sell as soon as they can for diversification whether they are optimisitc about the future or not. Thats why they are rich and awlays will be. They are smarter than they are greedy. They have so much equity they would benefit plenty if the shares go up anyway and would rather sell on the way up than the way down.