Most "jobs mentioning Rust" are in the crypto space for some reason. I can't fault devs for thinking that such "opportunities" are just not very serious compared to the alternatives.
I agree that crypto indeed started out as a dumb, speculative, monetary technology, but it is currently moving toward smart-contract, non-speculative applications, such as guaranteed voting or transfer-of-ownership systems. Crypto indeed started out as a nonsensically power-hungry technology (via Proof-of-Work), but it is currently moving toward power-friendly infrastructure (via Proof-of-Stake). I think the crypto sector will slowly become more and more interesting, employment-wise. For example, how about writing a single contract that is understandable not only by a machine, but also, at the same time, by a judge in a court of law?