Even wearing Wire Bra will effect your health and may lead to Breast cancer but Girls! you don't have to throw away all of your wired bras !! . Everything always has two sides, we just have to know pro & con and choose the choice that has less harm for your selves.
It is a good idea to have alternative bras in your closet and choose a proper bra for a proper activity.
Here are ideas of wearing a wire bra.
Don't ware a wired bra everyday; choose to wear a wireless bra some other days of the week. The wireless bra should not be too tight or too loose (see Are you the right bra), (Wireless bra recommendation)
Unhook your bra on non active period of time. For example: while you sitting in your work station. This will helps you relax your breast and your upper part of body
Use a sport bra on the day that you plan for a heavy physical activities.
Do not wear any bra for 10 - 12 hours a day especially during sleeping time.
See functional bra