Being ambitious for your family, community, country, humankind and yourself is a good thing. It reflects that you are a miracle and are accepting responsibility for contributing to your and others wellbeing.
On the flip side, being greedy reflects wanting much more than you need, and giving a lot less than you can.
Sometimes, there is a fine line between ambition and greed. For instance, some people will go to extremes to become powerful and famous. All at the expense of their family and life balance. They believe they are working so hard for the benefit of their family, however, what they do not realize is that the family needs their presence too, and not just their possessions. Khalil Gibran beautifully said: “You give but little when you give of your possessions. It is when you give of yourself that you truly give.”
Be ambitious, yes. Because your family; the world, and your soul needs you to be. However, be on guard for not crossing the line into becoming greedy in the guise of ambition.