Meltdown could be a loaded word in this context but yes a downturn is already underway ~
Corsair, one of the world's leading PC component brands, is being hit hard by macroeconomics and consumers' choice - and sometimes need - to keep more dollars in their pockets. According to its own internal accounting, the company has announced that it expects between $10 and $11 million dollars...
www.techpowerup.com
Which could get much worse if the war in Ukraine doesn't end & oil prices cool off.
There is no question that the world is facing challenging times, but that should not be confused with the pandemic boost to computer sales, as even in the best of circumstances such sales number couldn't be sustained. So lower revenue than 2020/21 should be expected for most of these companies, but that doesn't mean they wouldn't make money. I believe for the last 5+ years every CPU and GPU has been able to sell without any problem, despite sales volumes fluctuating.
And to take your argument to the extreme, to "sell them while they're hot" before and impending global economic meltdown, well even basic economics would tell you otherwise. I assume you mean the risk for hyper inflation, and if you were the maker of a goods that still will be useful after a "meltdown", and you
knew a meltdown was coming, selling as much as possible now would be stupid, you would rather retain the stock and sell it after the inflation