As intimidating as a highly volatile market can be, volatility might present opportunities. If you think an all-night rave sounds exhausting, consider the dancing plague of 1518.During the era of the Holy Roman Empire, a woman inexplicably began to dance erratically in Strasbourg, a town located in modern-day France. Eventually, her bizarre behavior infected several dozen other people, who joined her frenzied dancing in the street.The more the dancing spread, the more concerned that made everyone else. Eventually, the boogie fever continued for so long that the local medical, government, and religious officials intervened, sending them...See more