What is the scope of white hat hacker? Should I pursue MCA or MBAn to become an ethical hacker?

The scope is wide and on newspaper these days. You can see the importance of security and cyber security. To become a white hat hacker, you should get CEH certified first.

There is a lots of chance for white hacker. Cyber security is the most booming area nowadays. So, it is a better opportunity to start career. You can work as VAPT, participate in bug bounty, do CEH of entry level to pass for all. Side by side, you can complete your Master's degree.