I agree that generalizing too much is wrong, but at the same time we must admit that Generation Z, in general, is too addicted to the new technologies and new electronic stuff.
This is not something we will not agree on, because from the first day of their lives they are surrounded by various technologies - because their parents use them, even though they were born at a time when there were no smartphones, computers were rare and the Internet was considered a luxury only for the privileged.
It's also about the way the parents decide to raise and educate their kids: I understand that things change, but maybe giving an iPad to a little baby is not the best idea because they could become addicted and have attention problem when they go to school, it's something that may sound ridiculous but it's actually a problem.
I see people half my age with always the last iPhone model, always the last fancy bag, and especially I don't remember my friends spending so much money on clothes, I mean now spending $1k for a pair of shoes or a sweater is considered something normal, to me it's just crazy and not because I can't afford it, but because it's not worth it.
Then you live in a society that can be considered relatively prosperous, because the money they spend on luxury they can obviously afford - and they don't actually buy clothes or some expensive smartphones, but status symbols to show that they have money. I can't say that I don't like to buy something of good quality, which is sometimes quite expensive, but these are usually things that will be used for at least 5+ years.
Trust me, it doesn't matter wether you can afford something or not, many people will do everything to buy something just to show they are like everyone else otherwise they feel excluded by the society. Or their parents buying everything just because they can afford it. Luckily my family never had any financial problem but they would never spend $150 for a shirt, and I wouldn't even try to ask for something like that.
Regarding the future of bitcoin in the long run, I think that a lot will also depend on how Millenials will grow and educate their children.
Here we can ask the question how much influence do parents actually have on children nowadays? In so-called developed democracies, the family is increasingly degraded and children acquire their basic knowledge in schools and through watching television and using the Internet. Bitcoin is certainly something that may be interesting to them, although we know that the mainstream media presents it exclusively as an investment aimed at making a profit, or often in a negative context as something used by criminals or something bad for the planet because it consumes too much energy (which is of course far from the truth).
I regret that my family for example never gave me any financial education but I'm not even sure if they could actually teach me something besides don't spend more than what I can afford to pay, discovering bitcoin really opened me a world that I had never paid attention to before, I'm referring about money management, investment, thinking in a different way, etc etc. Bitcoin for me has been way more than "just" a digital currency.