Ask HN: Should I move away from JavaScript based skillset because of saturation?

I have noticed that there is a lot of competition for frontend/full-stack jobs where the tech stack being used is JS based (JavaScript/TypeScript, Next.js, React, etc...). In your opinion would developing a skillset in another programming languages like Java, C#, Golang or even going deeply on SQL would increase the likelihood of finding a job because of less saturation. A related question : If you have experience working in a specific tech stack (programming language + specific frameworks) but want to target jobs involving another tech stack, how would you go about demonstrating competence on this new skillset in your CV? Will adding personal projects with a Github repo do the trick? EDIT : My question can be boiled down to if "is it even worth it to stay in JS anymore" and not "how do i become a well-rounded individual" like it has been understood by some commenters.