How important is insurable interest?

How important is insurable interest?
【正确答案】：Insurable interest holds that no one may insure anything unless he has an interest in it,which means that if the thing insured is preserved he will derive a benefit from its preservation. Every contract of insurance requires an insurable interest to support it,or otherwise it is invalid and any claim made upon it will not be entertained. The time of an event may be crucial to the question of insurable interest. The interest passes with the document.