We always dream about things we don’t have, and when we get them, we quickly get used to them, and start dreaming again.
To learn to be content with things you have is not very hard. For example, to work as a volunteer in an oncological center - will help to understand how good to just not be sick. You can be a volunteer in distributing food to the homeless - will help to start valuing your house.
For starters, try to compare yourself not with top-10 of Forbes, but with those, who are really in the struggle. And then you will understand, that the only one true person to compare with - yourself. See how you improved in one week, one month, one year. It will be the most productive competition.