Some of us living and working in less "privileged" countries (I'm from Greece) don't have the luxury of having disposable income to invest, especially tech workers that are paid way less than tech managers.
I don't know exactly how things are in the first world countries, but the only disposable income goes as spare cash for emergencies, health problems and other similar activities.
Was the point of your comment to just complain about being a dev in Greece?
Having someone asking general questions as this one on a big tech news site read by a lot of people, it’s expected to get many different (controversial) answers.
Does it mean that in order to comment/reply under a Tesla thread I need to own a Tesla?
If your wage as tech worker relatively sucks compared to local wages, whatever country you're in, you're probably doing it wrong.
Perhaps you would need to find remote work or learn another language. Or simply work hard(er). Whatever it takes.
https://data.oecd.org/chart/5cbS
No doubt there are some savers in Greece although if I was one of them I'd probably keep my savings in a German bank account.
Also, it's trivial to move there for you since you are a EU citizen.