At the start of 2020, before the pandemic hit, I was thinking the same thing.
History can certainly repeat , and the conditions seemed ripe for the 2020s to be 10 years of the greatest asset price appreciation ever.
Of course anything can now happen, but with the US and every other country’s massive stimulus going around, it certainly looks like valuations will keep pushing higher for a while yet.
But regardless of booms, busts, recessions or depression, the way to stay ahead is invest in real assets. Simple.
Property and shares being the main asset classes, and other commodities, collectibles and other currencies (even a small amount of crypto) are worth having in a diversified portfolio.
If there is a major drop, hold tight, try to keep buying , dollar cost averaging and in the end all will be fine.
Good luck all