投资和投机的关键区别:以现在这样的价格,这家公司如果不是上市公司你还买不买?如果你决定还买,这就叫投资;如果非上市公司你就不买了,这就叫投机。
The key to distinguish investing from speculating: at this price, if this company were not publicly listed, would you still buy it? If yes, it's investing; if no, it's speculating.