"A fanatic is one who can't change his mind and won't change the subject." --Winston Churchill
Cubs fans are always optimists when we see potential. Then we get nervous when things start really going well. The cards will probably be sold at a loss in the midst of an MVP season because in our guts, we will expect a career ending injury.
The only name id think of is Arod, but I wasn't buying cards then so that could be off
I also think that the internet has fueled all the crazy prices. EBay and instant highlights for every player leads to more excitement. Who would have been so excited about two spring training home runs before the internet?
Please note: Card collecting is my hobby, not my life. I don't take it that serious and like to keep it fun.