Swordsman Quotes: Investment is a game. When you are thinking about how you can avoid suffering a loss, others are also thinking about how they can avoid suffering a loss. As a result, anyone who thinks this way will suffer a big loss. This is what game theory is about: the prisoner's dilemma. And those who can control their instincts, control their emotions, and take the initiative to suffer losses often make a lot of money. To put it bluntly, that’s all there is to investing.