There have always been periods of irrationality in the markets but there's no reason to believe that equities are fundamentally untethered from their inherent value in perpetuity.
Eventually most of the overnight WSB stock picking geniuses are all going to lose their shirts and we'll see less of this GME nonsense. They make up a tiny fraction of trading volume anyway.
It happened in '07-08, late 90s dot-com bubble and about every decade or so before that for different reasons