Good idea ?
Plan to build gold storage maybe art storage.
On the start up based plan so you can invest in and later earn some % from the holders fees.
The idea is that we Also sell the holders physical gold or art.

The service should be cheap enough so many people can use that service

It's good idea becouse it's not easy to hold goods in your home it's good If someone holding for you and handling it for you with security.

If i see thanks for ur opinion