Are you one of the three people in the world who can write C++ code without security holes? If not, I'd say it's worth it. That was half joking. :)

The half serious answer I can give is: Do you have a job offer you want to take or at least a solid plan how you can use it professionally? There are so many C++ jobs, that you can most likely find another one that meets all your other requirements (location, salary, domain, etc.), should you decide to leave your current one. I don't think that is the case for Rust yet (But I'm rooting for it! :)

The second point is also my answer for OP.