2- It has already been on a very long bear market (2013-2015) where everyone said pretty much the same thing (fad, tulip, the experiment failed .... ). So yeah the new holders will go through rough times but your argument that it reached the peak of the hype cycle has no logical facts to support it since you could have said the same in the peak of 2013.
If anyone knew when the peak is(was or will) would not be here commenting on HN or talking about it but rather selling this knowledge ... and this holds true for any investment.
It clearly did not kill Bitcoin, and Bitcoin won't die if the same thing happens again.
Ethereum crashed from $21 to $7 last year after the DAO theft. A couple months ago it went from $420 to $130.
I also think it's a little silly to categorize Bitcoin owners as 23 year old traders. It has a $95 billion market cap. I think there's a lot more traders than just 23 year olds.
FWIW Bitcoin has already come back from a >85% decline at least twice, if you use intra-day data.