Dvorak: Your point is a matter of contention between different Shitos. Some hold that Bitachon means believing that it will all work out well and nothing will go wrong as Hashem is taking care of things in the same way a child has innocent faith in his/her parents.
I heard B’shem Rav Matisyahu Salomon Shlita that life insurance is part of the Chiyuv of the Kesuba.