I'm not sure how true that is when half the Rust job postings are cryptocurrency related.

In Rust communities, like the official Discord server, there tend to be more left type people. Furthermore, if you go to left leaning communities that aren't related to programming the few programmers who are there are almost always Rust enjoyers. The cryptocurrency use also exists, of course. I suspect that the common thread in both cases is idealism -- leftists want what they see as an ideal economic system while crypto bros, when they aren't scamming, want an ideal financial system. Rust in many ways is closer to an ideal language in a way that feels to me to be similar to those other idealist arguments