To fold money into a Christmas tree, you will need to take a dollar bill and fold it in half lengthwise, then fold it again in half lengthwise, and again in half lengthwise. Next, you will need to take the top edge of the folded bill and fold it down to create the shape of a Christmas tree. Then you can use a paper clip or a piece of string to tie the top of the tree together. Finally, you can add a few decorations to your tree, such as a star at the top, or some small ornaments.