I'm working in a company as a software engineer, Mainly we are focusing on PHP as the product is being developed in PHP (native) also there are a few products in Node.js, I tried to introduce Laravel but there is no luck to work on it. Now I have started learning Go language, should I focus more on Go or continue only with PHP and NodeJS. BTW I know PHP and NodeJS very well.
Be flexible, be agile in your personal and professional life. Don't be afraid to learn new things and step outside of your confort zone BUT with reason. Reason can be a career path or just money. Does Go belongs to your career path? Does Go belongs to your company's toolset? Do yo seek for new job oportunities? Some people follow a complete career path by using a single language i.e, PHP or java, but if you want to standout in the crowd this is not enough. You already know PHP. This is an oportunity to learn something new. In general, I would advise you to learn at least one language & library/framework per stack . This will help you to lead a team someday.