Incredible movie. Having the protagonist turn out to be the antagonist near the end is a great way to demonstrate issues with the corruption of wealth and greed and also makes one think about who people really are. I loved the plot and the way it progressed throughout, the pacing was also great, and it had me hooked the whole way through. I love movies that are deep, which is why this will forever hold a place in my heart as one of my all time favorites. If you like movies by Christopher Nolan or movies like thank you for smoking I highly recommend this.
Trigger warning, there are some pretty intense gore at the end, as well as depictions of parental abuse and can be very emotional. I do think it adds to the movie as a whole, but it can be a lot.