is likely to occur if it is worth the insane amounts speculated, and/or even if it is just a huge natural metal-rich rock with a very large cavern in its depths. That far from the sun there's probably a decent amount of ice on it too. Seems like it would be a perfect space base in those scenarios.

Psyche is tilted on its axis almost on its side, so it rotates like a rotisserie chicken, completing a rotation approximately every 4.2 hours. It's 220 km in diameter. How big would an inner cavern have to be for the spin to create an acceptable level of artificial gravity? Any hollow section could certainly be expanded. I wonder if its rotation could be sped up?

Yeah getting way out into sci fi land here but fun to speculate.