Well this feeling weren't as strong as it was before. I think it's because of the change of environment around me now. I feel challenged to be better now than ever. The question is it a good thing or not ? Well depends on the point of view I think. Some people say that it's a good thing, it means that I have the urge to thrive. That feeling of wanting to be better, the greed, are great in some area of life. It's okay if you can contain it in some context.
But in some other people point of view say, it's not a good thing, if I let it flow for too much and can't control it, the greed will become unsatisfiable. Luckily for me, I also have quite a high feeling of being a grateful person but for you who didn't my advice for you are to meditate more and try to see from the point of view of people who have less than you. So that the greed won't consume you.
"A ticking time bomb inside you cannot be defused by other people."
People who have nothing, want nothing and expect nothing are the happiest people in the world. I know it's a very cliché things to say but there are people like that in this world and most of that people are the people who have nothing to begin with.
P.S. Everything is okay when it is okay, not too much, not too little.