[Question] If I want elastic in clothes to last as long as possible, is it better to not use it until I have to, or to use it in a light rotation?

Basically I just found out the the only sports bra I've ever loved is being discontinued, so I obviously snapped up six of them since they were also on clearance sale.

I want to wear this bra for as many years as possible. Should I wear three of them daily for 5 years, then unseal the other three and wear them "brand new"? Or will that make the elastic degrade with no use? The other option is wear all six in a light rotation and hopefully wear them for 10 years.