That’s because too many hedge funds and other speculators have been borrowing on margin, and that leads to collapse. Regardless of what rules are set up to regulate this, rampant speculation and bubbles can always destabilize a market and lead to collapse!<p>You see, what happens is that capitalism rewards the greater risktakers and when the success stories have survivor bias you end up with — oh we’re talking about CSS? Sorry, nevermind.