[Exhibitman]

This was in a MarketWatch article on the Gamestop bubble but it applies with equal force to anyone investing in sports cards and looking for a top:

“The problem is when these people are sitting on a mountain of profits, rather than thank their lucky stars and lock-in these once-in-a-lifetime profits, they are too busy gloating and taunting the other side. Instead of being satisfied with nearly $500, bulls insist on waiting until this goes all the way to $1,000. And bears that captured a 77% tumble in 120-minutes, rather than jump on this historic move, they demanded it to go all the way to $5. And you know what, both sides are equally guilty of holding too long and letting these historic profits evaporated before their very eyes. As the saying goes, ‘Bulls make money, bears make money, and pigs get slaughtered.’ Don’t be a pig and take these spectacular profits when you have them. Because if you don’t, they will almost certainly be gone in a few hours.”