No. You waste time if you half-learn something and then hop to the next hot thing again. Haskell is awesome too.
Do know that conceptually, Elixir and Haskell are pretty far apart. They're both functional, but that's about it. Elixir is dynamically typed, Haskell very much not so. It's a whole different approach to programming; where in Haskell, you'd "let the types guide you", in Elixir you simply can't do that. Elixir is much closer to Lisps in that regard.
I'm somewhat in the same position and I'm learning both. Haskell is great for learning new programming concepts like monads, applicative, and every other crazy thing Haskell programmers love. It also helps you think and get used to the concept of pure and unpure functions which definitely expands into other languages in a positive way.
Elixir on the other hand gives you a great development environment by default with ExUnit for testing, the Mix build tool, hex.pm packages, a tempting library, and more. All of the tools feel mature as well. Immutability with rebinding is great, concurrency is made simple compared to some other languages, and it also has the entire Erlang ecosystem of libraries to work with.
It's definitely easier to write Elixir, but I wouldn't say better. They're both great languages, just different.
For me, learning Haskell was a supremely educational experience. There is no better way to learn functional programming techniques and you will not regret learning it. That said I can count the number of times I've used Haskell in a non trivial application on one hand.
Elixir lets me use a lot of the stuff I learned with Haskell, and I've already used it building a real time component for an app I'm working on.
