I think Gary V is a multi-millionaire who also fell back into the hobby, he doesn't need to pump and dump this stuff--he might actually just be having fun.
One of my regrets is selling my Magic/Bird PSA 7 in January for $400. It's now 4K
There was no way to predict that spike at that time so I don't feel too crappy about it. I usually don't dip into my PC but I kinda needed to to make down deposit on a vintage baseball set. Oh well, lesson learned I guess.