Provided the speculators do not spread false rumors about the assets they're hoping to see fall in price, or engage in other fraud, their activity is socially beneficial.
只要投机者没有对他们看空的资产造谣，或以其他方式欺诈，他们的投机活动就是对社会有益的。
2
As soon as any beneficial mutations arise, natural selection will favour its spread.
一旦发生任何有益变异，自然选择将支持其扩散。
3
Although it's good to focus on your own happiness, it's always beneficial to spread the joy around.