I don't understand the risk/reward of it all. I was reading Joe Posnanski's The 100 and found myself really interested in the Hank Greenberg story so I took a peek at his cards on EBay and watched a 2006 Upper Deck SP Legendary Cuts Cut Auto. #60 - ungraded and in good condition visually. Hall of Famer, 2x MVP, passed away so there is actually a hard limit on the autos, etc. It sold for $330. His 2021 Dynasty Dual Relic/Cut Signature 1/1 went for $375 shipped. A PSA 3 Gowdey from 1939 went for about $300. Alll of these are less than a Bowman Draft Marcelo Meyer to 150 non-auto, or less than his Draft Auto (Chrome) not numbered. I get the speculation aspect of it all and that the market of a player from several generations back who isn't a Ruth, Gehrig, S+ tier player is probably pretty static, but I just can't imagine paying more for a decently rare parallel or a basic signature of the #15 prospect in baseball.
Of course, if part of your collecting is to get players you believe in and then cash in if you're right, that is fine. I just can't imagine having $1000 in my hand to spend on a baseball card and choosing something like...a Jasson Dominguez 2020 Chrome Refractor Unsigned.
I guess for some folks, that's not a lot of money so it's a bit like fun long term gambling, and I understand the breaking mentality a bit more, (I might get multiples, I might get something obscenely rare, etc.), but the market seems so off kilter to how most other collectibles work.