Do you know why we hate those envelopes that come with any greeting card you buy at Hallmark, Papyrus, or a drugstore? They're SO boring. Always the same rectangular shape, always the same opening mechanism, with the only innovation for each envelope being the color, which does vary to match the card.
But like gifts, in which the packaging/wrap can either make the gift inside look like a pile of crap or make it look even better, greeting cards are just that much more enjoyable if a lot of thought goes into the wrapping of them. That's why you should craft this origami envelope that's like no other. It opens up from a diamond-shaped joining point in the center and looks plain cool.