Elixir is like an alien shiny flying soucer. It can do all types of technical marvels with a simplicity that is not possible without disfiguring more traditional frameworks. So I'd say having a cursory glance at it is a must.

In terms of $$$ value, it is extremely efficient --including all the "alien" stuff, and that's why it's so cool. An Elixir team will generally create things cheaper to build and operate.

Now, the question is how many Elixir shops you are going to find a job with, but the answer to that depends on the type of career trajectory you are choosing. For example, Rails is not an industry standard by any means if you think in terms of classic IT consulting jobs but has a stronger dev mindshare in startups, so there you go.