yeah he was always about just grabbing whatever he could and fukk everyone else, he just happened to end up in an environment that encouraged that sort of behavior
like he fights against castro and communism in the beginning not out of some political alliance but because he wants to be rich and on top
the movie just takes the idea of america as the land of opportunity and perverts it (or maybe takes it to its logical conclusion): tony wants the american dream and he doesn't want to wait for it, he wants it now
it sees america as this corrupt landscape but at the same time it doesn't really shy away from showing just how cool that corruption can be, i think it's just really honest about the appeal of that sort of lifestyle, it's all about the high, about the rush, about pushing it to the limit and tony's death is part of that appeal, in a way
it's a character who takes a shortcut to success, it's a fantasy to people