My opinion. If this is your core holding and you have years to go, no need to do anything but watch. It is a fact that market timing is basically impossible, sometimes a little less impossible for the PROS. These clowns who come on boards and tell you they perfectly time every buy and sell are full of BS. When did you ever see them show a collection of moves IN ADVANCE, where they correctly called every turn? This company will be GWPH and more in the not too distant future. That means $20+ per share and over $2 million dollars to you. Anything wrong with that? What you do is add, not subtract , to your position along the way. When you have enough, or need the money, you cash in your position and dont look back.