In fact, Hold is not always a good idea. You yourself know that there is no eternal growth. As soon as the correction of the course began, I sometimes sell to buy below if it's a good one. Maybe say goodbye if the project had a big advertising noise, but I didn't really like it initially.
Buy on take-off cost of projects that are very promotional is a great stupidity. Empty expectations exaggerate the real price many times and the correction will be very large.