What Does Optional Life Insurance Cover? 
Assuming you mean guaranteed insurability option , you can purchase a rider that gives you the choice to purchase additional life insurance without medical proof . This can be a very valuable option , just like leasing a house with the option to buy . If the value of the house goes up , you can exercise the option to buy . If it goes down you dont exercise the option . If you need more insurance later on you can exercise the option to purchase more insurance without medical underwriting . 