It always does? It's partly a psychological phenomena and partly just a question of running out of greater fools. The first one is that once there's a change

It always does? It's partly a psychological phenomena and partly just a question of running out of greater fools. The first one is that once there's a change in mood for some reason (some event happens, e.g. a recession which in some ways is its own psychological phenomena) everyone convinces themselves that equities are too expensive, the prices start declining and that feeds a further decline. Just look at the GME stock as a microcosm of that situation. In terms of the greater fool thing, you can only keep buying and selling the same thing for a 10% profit every year without eventually running out of people who will buy it. I guess see also the GME stock as a microcosm of that? And so, all bubbles must burst.