Is Javascript the best way to go forward for aspiring developers with non Computer Science background

I am a self taught front-end developer. I work with Rails App + jQuery / Ionic +Angular and I'm currently learning React / Vue + Node JS & Php Laravel. PHP because there are tons of jobs available, and JS because I'm able to grasp easily, being a front-end developer.

Sometimes I think, should I invest my time in languages such as GO which is serious contender to Node.js or should I continue learning Javascript.