This is an interesting book about trading. Go read it.

9 Key Characteristics of Shark Investors:
• Sharks are aggressive
• Sharks are opportunistic and reactive
• Sharks stay in motion
• Sharks plan their attacks
• Sharks are patient when they stalk their prey
• Sharks take advantage of the emotions of the crowd as it becomes frenzied and emotional
• Sharks don't have emotional or sentimental attachments to the stocks they profit from
• Sharks are risk averse and do not hesitate to swim away the moment they sense danger
• Sharks have an attitude....