A violin lies in the case, or it lies on the chair, and the chair is the place where it falls or gets taken. The bow next to it is often more expensive than the instrument you are thinking of. In the overview Security for collectors this is small enough for a bag and sensitive enough for the climate.
What breaks without a thief
Dryness splits the top and the back. A bow that lies tightened in the case loses its tension and can warp the stick. You loosen it. You do not store the case by the heating, and not in a cold car overnight. You photograph the stamp inside once.
When someone comes
The case has a handle. It does not stand by the door, and not in an open car. Very expensive instruments are insured by name. The papers do not lie in the case compartment together with the bow. A second description, measurements and photos, lies outside the home.
The folder
Violin and bow as two lines. Maker, stamp, proof, last work. A crack that is already there is in the photo.