Actually, I try not to think too much avoid it.
There will be always someone richer than one and someone in a better position than one, in the same manner there will be always be millions of people living in poverty, who cannot even afford to eat properly.

One needs to have both a certain amount of inspiration and push to move forward and improve with time, but at the same time, we need to be grateful for what we have accomplished and what we have.

Also, life is not a straight path, it comes with ups and downs, there have been rich people who end up in misery and miserable people who have managed to get rich. Money comes and goes.