[iamthemonster]

Sadly international diversification is far less effective during downturns, which is exactly when you need it. It really turns out that the old adage "when the US sneezes the whole world catches a cold" is borne out by the evidence: https://earlyretirementnow.com/2017/08/23/how-useful-is-inte...

I started getting concerned about the US stock market being overvalued in about 2019. If I'd followed my gut and ditched the US entirely I'd have missed out enormously.

Unfortunately the "guys, it's getting a bit frothy" stage can last for years and years. If you pull out of the stock market whenever everything's looking irrationally overvalued you're probably going to fall behind the unthinking approach of continually investing the same amount every month.

Although I don't think investments are easy to "bubble-proof" I feel like your career choices can make you more resistant to catastrophe. The strongest strategy of all (if it's practical in your lifestyle) is to be nationally and internationally mobile so that your job search can cover the entire world, and you pick whichever employer is most desperate to find someone. After that, you can sometimes transfer internally to teams that are more robust (in my industry we have teams that design new facilities and teams that run existing facilities - the ones that design new facilities are far more vulnerable to ups and downs as projects get cancelled). Finally, you can make lots of casual contacts in your industry (we sometimes get together for coffee or beer with other people in our city who do a similar job at other companies) - then when you're made redundant, you've got the inside information of where new roles might come from.

On the cost side of the equation, your choices of "how big a house & car can I afford?" should learn towards being more pessimistic, but often there's not huge scope for choice there in the short term.

Long story short, the glib answer to your question "where do I put my money now, knowing that everything's going to blow up?" is "leave it in the S&P 500 and be aware that one day it will blow up"