It's really no different than the stock market. There will be peaks and valleys, somewhat in line with the rest with the impact of the economy on other investments. Newer cards and memorabilia are much more sensitive to flavor-of-the-month and people "short" them. Do you think a Tom Brady SP rookie is going to continue to get $15k in the future? Maybe, maybe not. But, I don't anticipate a bunch of new pre-war stuff getting discovered and, with the internets, there is a lot better understanding of how scarce some of the issues really are. Don't expect T206s, 33' Goudeys, or 52 Topps cards to tank anytime soon. Sure, there will continue to be fluctuations as the economy pulls back or surges forward. But, a lot of the vintage stuff is going to continue to rise over time.
It seems we had this discussion back in 2008-2009 when the economy tanked. The smart guys got some great deals
