How much capital do you need to have for your copy investment to be effective?

I copied someone,
This person lost all his money,
And I lost only 5% of the copied amount!
Why?
Because I am a disciplined person and I do not allow greed to control me,
The first thing I do when copying is to go to the advanced settings,
Set 10% as a maximum for each order,
Set 1X leverage
And I am satisfied with small profits,
When the rise is over I make small profits
But when the decline is over I am comfortable because the losses are very small.