I expect only based on the fact that my parents have an abundance and most likely there will be something left over when they die.
But I don't expect an inheritance in the sense that I it is my parents duty to leave me money.
If my parents want to leave all of their possessions to charity when they die, or decide to give it all to my other siblings, then I will be fine with that.
It is their money, and they can do with it what they want.