Earlier quoted context omitted.
My choices would be: - Elixir - Rust - Clojure - Crystal In that order.
Are you an expert in all those languages? To me these are the exotic languages which one gets inspired from when reading the stackoverflow survey, but there is hardly any one person I know who has mastered even half of those.
EDIT: I'd also like to add that Elixir and Rust aren't "exotic." Crystal may be, but it's basically just compiled/typed Ruby.
I've been using Elixir professionally for seven years across multiple companies:
1. Divvy.
2. GoSkip.
3. Podium.
4. Actiphy.