Ann: Meleya Update - Significant Discovery At Orion Target, page-580

I'm not great with maths so help me out, i see people talking about free carry so

let's say i start with $500, it goes to $1000 so i pull my initial 500

now its all profit and no actual loss even if i lose the whole remaining 500 id break even.

but wouldn't all future profit now be less because there's only 500 left making gains as opposed to $1000?

wouldn't it be smarter to keep the 1000 in and only pull my initial 500 if the total value drops all the way back down to 500 as this let's me still possibly gain value on my $1000 if price keeps going up? as opposed to only gaining on $500 if price keeps going up?