[lollipop25]

From where I came from and where I am now, the trend for freelance jobs is always around PHP. :P

As for Node vs Go, I tend to hear more stuff done in Node rather than Go. One perk of learning Node is that it's just JavaScript. You can easily transition from the server-side to the front-end and get another ballpark to play on. Go tends to be more on infrastructure, which usually exist in big companies with large systems which means regular, permanent positions rather than freelance.

You can learn both though. Nothing's stopping you.