I think you are missing the point. The inheritance is a gift from the people that brought you into this world. As a gift, you should assume that it means something to them to be able to offer this to you. It could be more, it could be less, but it is something they worked hard for and they want you to have it more than anything or anyone else.
Does that touch you in any way?
Could you put a dollar value on what that gift should be worth?
I really, honestly hope your parents are leaving you with some fond memories and good character, because that is what matters. The inheritance is a gesture. If you have any integrity, you would use it to better the lives of the ones you love.
Yours to choose. Own it.