I have threads that i've had for years and years. Just don't let the sun get to them. That goes for your fabric too. I have a window facing the west and the sun rays come through in the evening. I make sure to shut the blinds and curtains at that time, because my material is directly across from the window. Have you ever noticed fabric that sets on display in the store windows? Most will have streaks on them where it has faded. Same with sofa's and bedding in store windows.
Syl