风险是永久损失的可能性，而不是波动。

Risk is the possibility of permanent loss, not volatility.

永远不要因为河'平均'只有四英尺深就趟过去。

Never cross a river because it is on average four feet deep.

现金是一张没有到期日的看涨期权。

Cash is a call option with no expiration date.

在买入之前，你应该已经想好在什么情况下会卖出。如果你不能在买之前写好'卖出条件'，那你就不应该买。

Before buying, you should already know when you'll sell. If you can't write down your 'sell conditions' before buying, you shouldn't be buying.