Insurance is a must for a Mount Everest expedition due to the high risks and challenges involved. It should cover medical expenses, emergency evacuation, trip cancellation or interruption, personal belongings and equipment, and liability coverage. In particular, insurance should also include coverage for longline rescue operations, as climbing at extreme altitudes may require specialized rescue techniques. Having insurance provides crucial financial protection and peace of mind in case of unforeseen events or emergencies during the Everest expedition, ensuring that climbers are adequately covered for the risks associated with this challenging endeavor.