Does Real Wealth Get Lost When Bitcoin "Crashes"?
No.
Bitcoinand other speculative assets such as stocks do no generate wealth. When Bitcoin crash no wealth is lost, because no houses gets lots, almost no services are out of activity, no physical goods are lost.
Real wealth in my opinion is what makes people's life better: manufactured goods, physical goods, services, education... Speculative assets don't really interfere in the real world.
When bitcoin crashes basically the only impact is on speculators bank account. But numbers in a bank account generate no wealth.