You are not understanding the magnitude of the plot of this film!

Rating: 10/10 (25 January 2020)

"Until you can't tell the difference between a stage prop and a real knife" - Harlan says to Marta in the attic in the beginning.
Harlan wanted to die. And planned is own suicyde to the most smaller detail!
Even the title suggest it!
He planned to die (as a gamer he is referred to be) with one of his games, where he furthermore from dying, planned a lesson too is whole family especially for is completely "stupid but confident" grandson. By the talks he add in the night of his birthday, he predicted the behavior of all his relatives, and, justified by the "oh, Ransom" talk in the attic, predicted the stupid and reckless behavior that Ransom would have after being left on his own. So he made all the plan! Purposely throwing the game to the ground, inducing Marta to an error, that would annul the switch of the glasses (a way of murder that he predicted Ransom would do, as he know he is a good player), and free Marta from mistakenly killing him! And dying on his will, because he "doesn't fear death anymore"!!
Finally he switches the knives, by knowing how is grandson was going to act, "Until you can't tell the difference between a stage prop and a real knife", and saving Marta. (I do not believe that having all those knives as decoration, the propose would be for them all to be prop knives.) And he enfatizes that by staying the knife in the attic' table, where probably that knife would have been a prop knife.
I know that probably I'm just making some assumption, but the Easter eggs in this film are aligned in such an order, that I can really see this to be the bigger plot in here!!
What do you think?