I've always said that eventually 'our' collectables will no longer be collectable.
As a rule collectors collect their childhood items. Our childhood items won't concern most of the youngsters nowadays unless you have brought your kids up enjoying what you enjoy. It does bring a question about selling whilet you can still get a good price for things, but like has been said, if they bring you enjoyment, keep them and let someone else worry about them.
Fozzy