Just to be clear, the OP is talking about
net worth (assets minus debt), not income.
For
income levels (US only), see here:
https://www.crappie.com/crappie/off-...8-upper-class/
As a side note, we are very fortunate to live in the USA:
Despite progress in reducing extreme poverty, nearly half the world's population lives on less than $5.50 a day, with a rising share of the poor in wealthier economies, the World Bank said Wednesday....
... And poverty is becoming entrenched in Sub-Saharan Africa, where 84.5 percent of the population still live on less than $5.50 a day, the report said.
Nearly half the world lives on less than $5.50 a day: World Bank