Cyber Security Job in the Future

Next year I will continue my study to the university and I want to make sure that what I am going to learn, is going to e useful in the future. So, I’m considering to study about cyber security. My question is: What do you think about cybersecurity job in the future?will AI substitute the role of cyber security experts? and lastly, if it will, how many years will it take for the AI be developed?
Thank you guys, if you have any tips regarding studying cyber security, please do let me know. Thanks guys!!