I don't follow a lot of this seeming pile on mentality that you need to sell before a certain age or worried about value collapse. I get that a lot of us have sizeable very valuable collections.but that's what's they are your collection,your hobby,your lifes work.do you also feel you have to sell your house,your car or any other valuable contents in your house?
I'm just another one of those run collectors that plans on dying with all my toys.damned the world I'll be in a van down by the river with all my chit before I give up what I've loved most all my life.
Remember,he who dies with the most toys wins.