Nothing forces them to hold to their bitcoins. They can convert donations into national currencies as soon as they are received.
Anyway I expressed my opinion about the Wikimedia foundation already. I believe we should NOT donate anything to them.
Though Wikipedia is a great project (possibly the best ever that came out of the internet), I think the failure and disappearance of the Wikimedia foundation would be a good thing.
+1 in general. Wikimedia became just another corporation, with all the "good and bad" of such.
Wish it were replaced with a distributed platform, which we discussed here and found in development back then...
Here was the Wikimedia response to my donation offer in February 2011:
Thank you for your email. BitCoins are currently in beta and not widely used, so
we're reluctant to accept them at present. However, I've spoken to some of our
fundraising people, and they're looking into the possibility of accepting bitcoins
for next year's donations drive.
Yours sincerely,
"next year's donations drive" is here!