I'm not going to judge you on moral grounds. Instead, consider what would happen if everyone lived like that. What kind of world would we have? I think it would be a hellish dog-eat-dog world.
You may believe that the world is already that way, but at the moment, there is a lot of kindness, compassion and consideration too. Instead of that, if everyone had the attitude of "I got mine, f* you", the world would be unimaginably worse than it is now.
Moreover, that kind of living is unsustainable in the long run. If you collect as many resources as possible to the detriment of others, sooner or later others would try to snatch those back from you, even by violence.