It's not only about palladium or any other kind of ore. It's that you can launch from there to Earth orbit and spare most of the costs of lifting mass from the surface of our planet. Then you build habitats and ships with that stuff because it's much cheaper. Too bad we don't have neither mining nor factories in space yet. Two not trivial technologies to develop.

The book Delta V [1] explores that scenario, with an asteroid on an orbit close to Earth to minimize the delta v to ship things back home.

[1] https://daniel-suarez.com/Delta-v_synopsis.html