This is an excessively cynical, misanthropic view of events. I know a lot of people who could be described as "long bitcoin" and while there's no doubt a few opportunistic types, most are genuinely excited and actively involved in something they truly believe in.
Your bitter prognostications about "young white libertarians" says more about you than anything else, IMO. And invoking the dot com bubble doesn't help your point - the internet was, indeed, the next big thing, but the bubble was misinformed and 10 years too early. Long term, though, "dot com" was and is real, and many are hoping and working towards cryptocurrencies travelling the same path.