Day 21: A card of a rookie you thought you were "investing" in
I'm not the investing type. I only buy Bowman for my type collection, not for prospecting. I don't hoard RCs and keep an eye on who's hot and who's not. It's entirely possible I have a 1993 SP Jeter rookie sitting in a box in Georgia. Or any other 1990s high-value rookie card.
When opening cards at a shop, occasionally I'd get a card that the owner expressed interest in; "Oh, he's going to be good for Seattle next year!" "That's the best rookie in the set!" I'd get a little happy with my luck and completely forget about it.
If anything, I'm the opposite. When I buy cards for my type collection, I go after the cheap players. For the Awards collection, I wait if I can't find a cheap card for the ROY award. I rarely, if ever, collect sets focused on rookies, unless it matches one of my existing collections (Diamond Kings, for example).
That said, there are two players that I've collected since their rookie years.
So I'm not really investing in either player, though a good bit of money has gone into each collection.