No sense in waiting. It will need a new one and you for sure want to do it before it leaks. While the radiator is out is a good time to access front end stuff like the belt, etc. A search on here will show what others have done.
Curious who else has had a failure of their radiator on their 200 of the 08-10 model years by a crack on the top next to the molded in platform. I got lucky and found mine before it was catastrophic. I notified @TexAZ because I know his truck is close to mine in Serial number to see his radiator and his is also cracking, but not leaking in this spot yet. If you have a 2008-10 200 you should look at the top of your radiator for the tell tale signs of a crack. I know a few other 200 owners have been able to get Toyota to cover...