Fear, uncertainty, and doubt (FUD) is a disinformation strategy that influences traders’ behaviors in crypto trading. FUD can cause the price of a crypto coin to fall down, not based on fundamental or technical analysis, but based on negative or false information that spreads around social media. Social media that spread FUD have their own reasons to do so, such as promoting an alternative coin or malicious shorting the related coin. In order to avoid FUD, traders need to seek cryptocurrency news from reliable sources, and such news does not have a vested interest. Also, it is important to look for multiple sources to obtain a comprehensive view.