Some people are short-term traders, not long-term investors. There can be good reasons to avoid holding this stock, including the possibility that the Appeals Court may have an unfavorable ruling in the lawsuit.
Another reason to trade instead of buying and holding is the possibility of a compounded profit if your trading skills are good.
A third reason to avoid holding this stock is the possibility that some or all of the Greenshift executives are in the process of stealing value from the stockholders. I've seen it happen with another stock. If this company's management wants to hurt us, there are many ways of doing it, but they all carry some risk, including the possibility of prison time for CEO Kevin.