Metamorphically speaking, life is really unfair. And if I would base with the information given. Some were practically born rich, some were sadly born poor. But the thing here is, how to live our life? Some rich people, they have all the thing they want in just a snap of their fingers but at the end of the day, they feel incomplete. While some poor people, having companions to get the days go by is simply a happiness for them. I think it's not merely the money itself that makes us rich, but the amount of appreciation we have in our lives. We all differs with talents and intelligence. But we all have opportunities that knocks a lot of times --- it's just a matter of choosing what door you will open; we all have a perfect timing for everything --- it's just a matter of realizing what is what. We are all rich by all means. Let's just don't forget to add spices like hardwork and efforts.
It is not just metaphorically speaking. Life is unfair even in the strictest and most practical terms. With that said, we should still accept the truth that in many cases, if not to say in the majority of cases, our future mostly depends on us. If you were born poor, and by poor I mean devastatingly poor (say, somewhere in Africa), it is unlikely that you will become a Bill Gates or Warren Buffett but you can still do a lot and achieve much. Much more than your peers and fellows.
As the saying goes, if there is a will, there is a way, so it is our thinking that is our worst enemy at the end of the day. Most people think in terms of how good they are at something. But this approach tends to backfire massively if something doesn't go right or just goes wrong. It is better to think in terms of getting better, then mistakes you make won't be as painful and you can get the most out of them, actually learn from them.