I am not sure whether the wikimedia foundation actually needs money from individuals. From what I could find by searching “Does Wikipedia need donations”, they seem to have plenty of money. I’ve also seen from people that after donating, they like to haunt your email inbox for more money.

I myself prefer donating elsewhere instead. In my opinion a good alternative is archive.org. It’s hard to track how much they get sued, and now they even were hacked recently.