Different Kinds of Insurances

Insurance is comment in the world in which we are living today.   But not all insurances, some are still extremely complicated and only the experts know what they are talking about.   The common insurances that we know about are Health Insurance, Auto Insurance, Accident coverage insurance and unemployment insurance.  Why do we take insurance and pay the insurance companies year after year?   This is our adverse fear of the unknown.  For instance, Health insurance, a lot of us take it when we are healthy, why is that so?  We take the insurance to protect ourselves against unknown diseases or misfortune that may befall us.