> They discourage the regular guys from screwing themselves.
If you're a little guy who believes that, say, 2019ncov is about to tear the world a new asshole, that's probably a decision you'd like to make for yourself.
I don't doubt what you're saying, but it's a matter of perspective. Sometimes the "panic" is the correct reaction. We're sitting on top of a perfect storm which is shaping up to be a massive potential black swan. And with the current circuit breakers, trading is only interrupted for something similar in concept to "the 99%".
Across all indicators, too! Oil price, US markets, international markets, t-notes, gold price, and a bunch I'm probably not aware of because I'm not a professional investor. China just shut it's economy down for two weeks. Long term outlook is rightfully poor.