The rule of 90 or 90% rule is a gloomy statistics that was suppose to serve as a reminder or caution newbies traders. The rule states that "90% of traders lose 90% of their funds in their first 90 days of trading."
The context is true, but SOME "traders" could also win more than 90% of their capital in the first 90 days. The application of the 90% of traders lose in this instance is WRONG.
But if we five it a much larger sample size, 90% of "traders" actually lose in money, either slowly or quickly, it doesn't matter. A loss is a loss for the pleb and their money goes to the top 10%, most skillful traders.
¯\_(ツ)_/¯