Is it rude to throw away greeting cards?

Co-Producer Speed Weed • Previously Bart | Illustrator | Queer | Really likes 80's Synthwave

Not the most controversial subject, but I was wondering how other people felt about the above question. This came up because I've been cleaning my room, and a good portion of the clutter was from cards I received during holidays and my birthday. Is it acceptable to toss them after a while, or should I get rid of them?