Ah yes, how many do you have to give? the age old question! It does not matter the age you ask it, but the answer or reason may depend on that age!
I see lots of comments about getting "old" and then running out of them.
In my youth, it was a middle aged cliche, country songs were written to the effect, pop songs, a general attitude developed. It was "cool" to not have any to give.
The internet gave way to forum battles of extreme intellect and wit about who had less to give, a true competition! One-up-manship at it's finest! of course, the internet is owned by 14 year olds so that was to be expected.
The concept is subjective! Releasing all care for everything is not healthy and will not make your life improve.
For me, up to age 12, I was a social non-participant that went to school and then farmed. At 13, I still went to school and farmed, but had realized the world was bigger than home, the school bus, and the classroom/playground and that maybe I wanted to do something else. I was wrong, but by 15 I realized that AND that it was simply impossible to continue farming as we had been so the choice was not mine to make.
About this time I also realized a section of my classmates(small town, the entire school district K-12 was like 700 kids) was irrefutably stupid as a genetic trait, and while most were harmless and polite a select few were spoiled children. This rapidly lead to me not having any to give: about peer pressure, my "place" in the social order of a school, what poor leaders in the school thought or told me, and in general what piss poor, no moral fiber, pointless noise makers had to say about me, my life, my friends, my hobbies, whatever. People that mattered to me, mattered- the rest were filler.
This is not to say I did not respect others, more that it was now earned, whereas before it was simply mandated I respect my classmates by authority figures. Already by that point I had decided everyone gets a fair shot to be a normal person, they can have an opinion and I will respect it and them. Unless it is wrong. Then I will make an effort to explain why they are wrong in a civil manner. The ones that were adamant in their idiocy, were ignored and lost respect. Not that I was rude, but their immovable stance on a wrong opinion earned them nothing in my mind. Myself, I was open to others opinions, and if they convinced me I was wrong, I graciously accepted that. That is how I bonded with my small group of friends through school.
I also stopped having any to give when people earned a reaction. And by that I mean a rude reaction, a condescending one, a dismissal, or potentially a hostile one. The last one rarely came up, it helped being a lifelong manual labor farmer, by the time I was 17 I could probably have killed someone with one punch(I was lifting K cars off the ground by then) so the a55hats of school left me and mine alone.
So by graduation, probably the year before really- I was me, no one was going to tell me otherwise, and I was going to make my place in the world by living as I thought was right by what I believed through my observations thus far, my examination of the gospel, and what my parents had taught me about respect and responsibility.
I have spent the last 26 years that way. My career has moved forward. No *** kissing, that is not me. No BS, no lies, no throwing people under the bus. Respect given, truth told(the truth will set you free) and I have watched the fools trying to take shortcuts have their lives blow up in their face.
I live the way that gives me pride in my own actions, knowing I am not doing things at the expense of another, knowing everyone has been given a fair shot and how I respond is what they earned.
So I have lots to give, where they are earned, where I want to give them, who I want to give them to, at my discretion. I may not be rude to an idiot, but they will not be given anything besides kindness unless they earn a reaction from me of their own accord. In modern times, because we have to label everything, youngsters refer to this as "sigma male" because they are simple and find anyone that can think without a pocket screen with social media on it some sort of anomoly. Labels and putting people in categories is nonsense. People have to earn their reputation as an individual. That is also how they earn one of my fucks.
Sorry not sorry for the wall of text lol.