That is why it is important to have a reasonable investment plan before starting. That way, you'd stick your plan. Forget what the news predicts. It's all unreasonable because they are probably selling on you. Everyone should have a reasonable exit point. Hence the word, reasonable.
Stop thinking about the whales, or the news media. Think about yourself, and what you feel is enough for you. It doesn't matter how high (or low) it can go.