Vess is correct there absolutely is a dilution of collectors. The last few coin shows I went to 95% of the people were dinosaurs like myself. Well, old dinosaurs die out and they are not being replaced by many young collectors, because in the current system coins are almost meaningless. So there's really no attraction, fascination to collect them.
To her credit, Mary Brooks made some efforts to bring in YNs--putting a mint gift shop in the White House for people taking tours. "Penny Bags" were also intended to attract YNs.