How many true collectors are there?

[boxbuster7]

With cards being ubiquitous in the last couple years I'm interested to see what people think.

Going to define a true collector as somebody who puts cards first and money second. They can sell a card, but mostly collect for the pure enjoyment of it.

my guesses

Basketball: united states: 50,000 - worldwide 100,000
Football: united states: 75,000 - worldwide 100,000
Baseball: united states: 100,000 - worldwide 150,000