If you want to give cash as a Christmas gift, there are a few things you should consider. First, think about the person you're giving the gift to and their interests and needs. Consider giving them cash in an envelope with a note explaining that you want them to spend it on something special or something that will make them happy. You could also include a gift card or gift certificate to a store they like to shop at. Finally, make sure to wrap the gift in a festive way and include a thoughtful message.