It looks a pretty tight way to mummify a mature man, though if you zoom enough you will see his gray hair. One thing is for sure: if you leave him like this for long, even when it’s a nice view, it could make his arms numb, because he has been mummified probably with his wrists tied up at his back. So there are three possibilities that come to my mind to deal with his captive:
1.- Keep him on a pedestal standing as a greek statue. If the author of this is clever, he has plugged his ass and blocked his urethra, so that he won’t make a mess in a long term mummification. The pedestal should have enough support to hold him from over the knees. A metal collar around his neck and connected with chains to the ceiling will make it enough to keep him still and standing. He will lean to his sides or bend forward or backwards sometimes, but just for a few inches, then he locks will force him to remain standing, what can be very tiring after several hours. But what else can he do except wait for the mercy of his captor?
2.- Another option is to hang him upside down from his feet, so that his head will be at the height of my crotch. Then I would open a hole to let my cock reach his mouth and I would face fuck him while I push his body against mine. It would be fun to use one of those vibrating massagers to tease his cock and eventually force him to have an orgasm and let him there hanging for a while.
3.- And the third option: pack him inside of a cage and take him on a truck to somebody who has previously arranged to rent him for a wild night. I would probably then add an extra layer to his mummifying: I would enchase him into one of those tight leather body bags, which at the same time will isolate him completely from the exterior world. I would tie a ribbon around his neck and he would be ready for delivery.