The definition of millionaire is earning $1M taxable income a year. And those high income millionaires only earn $1M in 7 out of 13 years. They were millionaires only half of the years.
We may not have any millionaires on this forum.
“The millionaire population is highly correlated to the financial markets. The researchers found that the median person who earned at least $1 million in a given year earned at least $1 million in only seven of the 13 years before and after that year.”