It's a tough market for Elixir devs at the moment - there seem to be a lot more people who want to work with Elixir than there are companies hiring for it. But on the flipside, that means if you're a company who wants to take a chance on Elixir, there are lots of available devs to hire!
Personally, I'm comfortable betting my career on Elixir at the moment. It's too goddamn good to remain a niche language - I expect it to get a lot bigger in the years ahead as more companies and devs fall in love with it. It'll happen slowly, and it's never going to reach the level of saturation that that, say, Javascript has, but I think it has a bright future.
Phoenix and LiveView are a joy to work with, much more so than any previous technology I've used. I haven't yet looked at any of the exciting new ML stuff that's happening in the Elixir world (Nx etc.) but hopefully they'll drive adoption too. I'm never going back to my old ways.