one reason you might because you think it will make you a good person

you are doing a "good cause"

which is just like morality

abstract and doesnt exist

you are lying to yourself

Again that doesnt explain people dying for others

especially atheists

atheists follow good causes all the time

look at college students

shouting about racism

yes but not when they want to die for their loved ones

and hate speech

dying for loved ones is because you love them

having them die

but you living would be too hard for you

so you prefer to just die

No thats not why they die

they're able to live without them but dont want them dying

what then

because they view their loved ones higher than them

of value

yes

but

deep down

all it is is your loved ones making you happy

so losing them is hard

involountary egoists view them as higher

that's what egoism is about

not seeing anything higher than yourself

because only then are you free

it makes you happy but you wont be happy if you're dead

if they are dead you won't be

if you are dead hapiness sadness don't exist

Exactly

So there is no egotistical point of killing yourself for others

for an egoist probably not

people that don't recognise themselves as egoists yes

because they are following a lie

but even egoists would kill themselves

depression,...

it all comes down to you