No language is worthless. It depends on what you want to build.

The language is a tool. There are very specialized languages that only do 1 thing but they do it very well.

For example kobol is an old language that most devs don't bother to learn because it is currently only used to maintain old/legacy infrastructure. As a result people that took the time to learn it and can currently use it can get very well paying jobs maintaining said infrastructure and cannot be fired because there is no competition