To have an insurable interest in an item a person must stand to suffer direct, measurable, financial loss if the item were lost, damaged or destroyed. The person must stand to benefit from the continued, unharmed existence of the item, or be prejudiced by its damage or loss or liability which may rise.
Your TV set to the value of R2 000 has been stolen from your home. As the owner of the TV you have suffered a measurable loss of R2 000 because you have a financial (insurable) interest in the TV set.