When you’re old, lying on a hospital bed—who will come to take care of you and keep you company?

Let me tell you a painful fact: the probability of a friend is 0; the probability of a granddaughter is 1%; the probability of a grandson is 3%; the probability of excellent children is 5%; the probability of children without achievements is 90%.
And the probability of a spouse/significant other is 99%. Relying on yourself is 100%.
So—what do you understand?