Remember, every technology you use today followed this pattern, with winners emerging that absolutely did go on to be extremely profitable for decades.
Most of us remember the .com era. But in the early 1900s there was literally hundreds of automotive startups (actual car companies, and tens of thousands of supplier startups) in the metro-detroit area: https://en.wikipedia.org/wiki/List_of_defunct_automobile_man...
Some of these went on to be absolutely fantastic investments, most didn't. All VCs and people who invest in venture know this pattern.
Everybody involved knows exactly the high risk level of the bets they are making. This is not "dumb" money detached from reality, and the pension funds with a 3% allocation to venture are going to be just fine if all these companies implode, this is just uncorrelated diversification for them. The point of these VC funds is to lose most of the time and win big very rarely.
There will be crashes, and more bubbles in the future. Humans will human. Everything is fine.