Same questions have been brought up for last 25 years... yet the values have always gone up.
If someone would have told me 25 years ago that people in the future would be paying 4 figures for a common topps card in MINT condition (PSA registry hype), I would have laughed in their face!!
......these same exact cards sold in the $1 bin in any card show back then.
Some prices are just plain crazy IMO, but collectors collect what they want, and their is alot of extra $$ out there to be spent.
PS 1949 Leaf