i bought most of my bitcoins 200-300$. So far i sold only 20%. Soon im selling allmost everything. We re in a bubble nothing going in 1 direction forever. My friends which didnt buy at 200$ want to buy now only because the price is going up. Enjoy the ride its not going to be very long. If you see the previous bubbles its easy to predict price under 1000$ At that point im buying again :) Its simple you buy on a quite market when price going horisontal and selling when price go vertical.