You would only lose your retirement if 100% of your savings was invested in company(s) that eventually went to zero.
Even if you're 100% equities, and concentrated in (e.g.) the S&P 500, that would mean that the five hundred largest companies in the US would have to go to zero before you would "lose" your retirement.
One could also go for a total US market fund (Russell 3000, $VTI) or total world market fund ($VT). Further, having a bit of bonds (10-20%) would allow you to be cushioned for things like the '00s, where the S&P 500 returned 0% for the decade:
* https://www.forbes.com/sites/advisor/2010/09/13/its-not-real...
Historically, even if you only invested lump sums just before crashes, you would have done fine as long as you stuck with it:
* https://awealthofcommonsense.com/2014/02/worlds-worst-market...
The stock market is basically the anti-casino: the longer you participate the better your chances of coming out ahead:
* https://awealthofcommonsense.com/2023/05/the-stock-market-is...
And? This has happened before and it will happen again:
* https://awealthofcommonsense.com/2014/02/worlds-worst-market...
If you're worried about drops risking your financial goals (retirement or otherwise), diversify: international equities, bonds, etc. As the time one needs liquidity more than growth approaches, decreasing risk is a standard strategy:
* https://www.kitces.com/blog/managing-portfolio-size-effect-w...
AI is no different than any other new technology over the last three centuries:
* https://en.wikipedia.org/wiki/Technological_Revolutions_and_...
If your retirement savings went down by 20% and you had to put off retirement by 5 years, but then you died after 5 years, you've lost your retirement!
Checkmate.
You literally cannot outsmart common sense.
The literal advice repeated everywhere is "diversify". If you did the opposite, congratulations on being a case study.
Of course, if a public pension fund is run this poorly, they will almost inevitably be bailed out at the cost of younger generations. Betting it all on one sector and refusing to blink when it looks like a bubble might be popping is not what I'd call competent management. That's just too much risk in the mix for a fund that needs to be there. If pension funds are overly exposed to one volatile sector, some really dumb people are about to lose their jobs, and rightfully so.
Why are we assuming a market is an inherent good and its needs are to be prioritized?
If a bunch of people might be reduced to poverty in old age and that's a sign of a healthy market, then I'm not super sold on this healthy market pitch...