Yes! Your insurance doesn't just cover you in case of an accident. It protects you in case of theft and damage caused by fire, hail, flood or vandalism.
It's mandatory to have civil liability insurance to drive your vehicle, even if it's only to move it from one storage location to another.
If your vehicle is stored for part of the year, you can add a storage rider to your contract. The vehicle remains insured, but your premium is reduced proportionally to the number of days it’s in storage.