I test a web application for my clients. I only do the black-box functional testing. I don't do any automation as there are other testers hired for that. I just log defects in a tool manually. Also I use the database server for validations that only uses DML statements.

I wanted to ask: If I only do black box testing for the rest of my career, will it affect my ability to grow in my field?

Will I never earn more than the automation guys? There is no scope of performance, security or load testing in my responsibilities.

thanks.