Re: Next time you see a please donate
Or remember the battle Wikipedia has to fight every day against attempts to push the boundaries of copyright beyond what statute says (and, when that fails, to extend the statute itself to steal content belonging to the public) and donate to Wikipedia.
I hope David Slater is very successful in selling his other pictures: I am sure the publicity has been very good for him.
However, that wish has no effect on the purely legal question of whether there is any copyright at all in the monkey selfie. I am not a copyright lawyer so my opinion is worthless but I look forward to this being judged in a court sometime. Although my suspicion is that David Slater will come under a lot of pressure from major wildlife photographers not to let any such case get to court.