Life is about making choices and perhaps knowing your limitations as a human being.

You can either be someone who knew various programming languages and wrote a few small single-purposed libraries (and jump the wagon to another new languages) or knew two or three programming languages and build something big.

It's a choice. Ask yourself if you are truly interested at these languages or is it because of the HN side-effect (hang out with a crowd with certain belief, you'll become them or want to become them).