It will probably continue as a freighter, replacing DC8, B727, B747 Classic etc. Possible use on the Hadj and with lower tier passenger operators. It's two flight crew, twin engined and has the alphabet soup of EFIS, ETOPS, TCAS, RNAV etc so there are still plenty of opportunities to try and make money with it for foreseeable future.
However expect to see the major airlines replacing them with newer technology.