This is related to expectations for darwins.
Many investors are attracted by recent above average returns like 40% on last year with a DD of 10%...
As long as we behave in this way we are doomed to lose.
Every trader wants/think to be able/let investors believe to do that.
Reality is a bit different.
Darwins managed by me are doing something like annual 15% with a DD of 20%, so this is my expectation for an investable darwin.
So, going back to what I hope will be a portfolio of robust darwins managed by serious traders, my expectation is 30% (15% leveraged x2)