@question authority: Wikimedia needs to sell those coins. Like they need to sell stock donated to them. Even if they'd love to hold them, they can't because of the structure of their foundation. Read it up..
I don't believe for one second that they bought Bitcoin for pennies and sold it later for a huge profit. If that were true why not just start accepting Bitcoin donations several years ago when they were first approached? Also, where did they exchange them? Do they have an address that can be checked? That's total BS. They finally know an easy way to get cash for them so they accept them now.