In what way ?
There is a beggar in the street *selling* handkerchiefs. I take a $5 bill out of my pocket and hand it to the beggar. To my surprise he does not accept it and ask me to convert that in Euro first.
Does this sound right to you? To me it doesn't.
Having useless stuff lying around actually has opportunity costs and as this beggar can't expect to ever use the 5$ bill, he's better off not taking it at all than having to store it somewhere and maybe even getting into trouble with his colleagues or anything else. Same with Wikipedia - if they don't accept BTC, accept that! Even if you put up 1 BTC in escrow that has to be claimed by them, there's probably too much hassle or overhead to get it converted to something they can use. Since services like BitPay offer to pay in USD instead, just do that or stop demanding to pay someone with something that's not usable to this person/entity.
If I decide to donate to you 5000 litres of milk (which are also worth something) you'd also try to sell it (which might be in some cases as hard as selling Bitcoins) and have BTC or USD or EUR or whatever and have great trouble with that instead of enjoying the great gift of fresh milk you've gotten.