You cannot trade tree bark for money and then food but You can trade bitcoin for money and then food.
Your comment is pointless
Let me explain how IRL works:
Wikip has to maintain a pristine public image to appease its major corporate & private donors, and to remain open to future, potential donors who, in turn, only wish to be associated with goodness & light. That's why wikip does not wish to *publicly* accept money from, let's say, the Russian mafia -- doing so would negatively impact its bottom line. It *will* accept such donations through a proxy, such as BitPay -- such transactions will not blemish it in the public eye.
Likewise, Wikip does not wish to accept donations in Bitcoin, due to Bitcoin's associations with hookers & blow. Wikip does not wish to risk tainting its public image by associating with Bitcoin.
This may or may not be "fair," but that's how it iz.