To inherit something, someone else has to die.
This is the whole economic scheme. A person has something. They die. They you get it.
Sometimes we inherit traits from our parents. They pass down their dominant and recessive traits to us through our genes. None of us gets a say in that kind of inheritance.
To ask how to inherit eternal life in the economic sense is to demand knowledge of the future. To gain what no one else has. Which, let’s be honest, is full of hubris.
To ask it in the genetic sense, is to gain something you already possess. It’s already there inside you.
Rather than eternal life, I suspect most people are hoping to inherit certainty.