The coffin symbolizes officials and wealth. You can put it in the spare room. I will be a little scared at first, but it will be normal after a long time.
In the past, my daughter's dowry was a coffin, which meant that a girl would be respected by her husband's family without spending a penny when she entered the door. If there are old people at home, they will also prepare coffins, put them in the wing and paint them with paint, which means that they are also for longevity, but these are rich owners and the poor have no money to buy them. This is just my personal opinion.