If your use case is similar to a web browser, where the code needs to follow a spec and needs to be fast, you'll want to use Rust.
You'll notice there's nothing in here about fast iteration times, so most startups don't want to use Rust (though they might want to use other people's Rust code for various infrastructure-y things like database backends).
And (importantly) will i earn lots of money if I invest my time with it?
Not right now.
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Speed and correctness are the strong points.
If your use case is similar to a web browser, where the code needs to follow a spec and needs to be fast, you'll want to use Rust.
You'll notice there's nothing in here about fast iteration times, so most startups don't want to use Rust (though they might want to use other people's Rust code for various infrastructure-y things like database backends).
Not right now.