The only thing I know that can kill buds is too much moisture in the air that gets trapped with the bud, or too much air and light. If no air can flow around the bud, moisture will settle in and create mold, but you can't just leave it laying around on a shelf, the light and air will dry it out.
Do what everyone's saying. Store in a loose bag and or containter in a cool dry place. :thumbsup: