One need to look at it from view point of the buyers. Who are these buyers? Someone who has lots of floating money, not concerned about future of his people or country or economy, having completely predictable life routine and not too busy at work. And most importantly someone who is nostalgic about old times and old things and who can sense and admire the human effort that goes into art.

That species of humans is getting extinct or do not have control of their investment decisions anymore. Someone who was born in the 70's and later is likely to be less interested in collectible than someone who was born in the 50's.

Another big problem is, the buyer now has hard time in sensing the raw human talent that went into the art vs the machine output. If it is a sculpture, we can't know whether it is 3d-printed. In old-times this trust issue wasn't there. It was raw human skill at display.

I keep telling this story from pancha-tantra the folk-lore tales from India. Friends walking in a forest, come across a dead tiger. Having great skills in different branches of science, they decided to test their skills to bring the tiger back to life. Sure, it worked, but before they could celebrate, they were attacked by the tiger.