From experience I can say that regging "holo" domains is one thing and renewing them is another. When this time comes you will realize that you don't really want to hold on to some of them and will probably let many of them go if there was no interest from buyers over the past year. And even if there is any interest, it is usually just another investor who is willing to speculate. This means that if you receive an offer via Sedo, its gonna be very low. I have just sent one of my "holo" domains to a Sedo auction and it will most likely end up with only one bid. I think this says something about their current value.. but I'm still gonna keep the best ones