I cannot get my cats to sleep on anything that is made for an animal... they prefer tables, chairs, sofa's, my bed.
I'm sure if I invested in a cat tree they would use that, they just like being off the ground.
That cat is owning the dog bed.
I have two cat trees and you can usually find them on those. I put that cat bed under the cat tree I made myself, because Leya is blind and has a tendency to fall off. Enzo seems to like it there though!