The key to understanding the ending is Patrick's final thought, 'This confession has meant nothing.' There's no point in his confessing if everyone is guilty, if everyone is as psychotic as him. Throughout the movie, we see people cover him for no other reason than it benefits them. He left a bloody trail in his apartment's lobby to be cleaned up by the staff. His friends say he was having dinner with when Paul disappeared, likely too superficial to have remembered. The woman showing Paul's apartment knows Patrick isn't there to view the apartment. She knows what he did there because she cleaned it up, as you can't sell an apartment for full price when dozens of murders took place there. His lawyer is lying about having dinner with Paul in London because it makes him look important. Even as he realizes Patrick is insane, he continues to keep the lie up for the sake of his image. And that's when Patrick realizes his confession means nothing. At the beginning of the film, he admits he's just a façade of a human being, that there's no real depth. By the end of the film he's realized he lives in a world surrounded by people so superficial they'll abet murder. Everyone would rather look good and profit than stop him. Everyone is a psycho, Patrick's just more honest about it.
The reason Patrick makes several references to Trump is because in the book he is obsessed with Trump and that's also why his character on screen dresses like Trump in the late 80s with the trench coat, slicked hair, red power-tie, etc.
@@wannawatchamovie I think it was a term coined in the 80s for (y)oung (u)pwary (p)rofessionals that were successful in business overall .. not just working in wall st
