Exactly Blue Wizard. One should never invest his/her money into a stock where they have not done a thorough bit of research, weighed the pros (making $$'s) & cons (losing those same $$'s), and made a decision as to what the risks and benefits are.
And yes - If the conditions change or new information comes to light - re-evaluate the risk/reward.
But never, never, never buy on uninformed impulse, or sell in a panic without a game plan and triggers for enacting that game plan in place.
We all make irrational & bad decisions now and again. The trick is to not make the mistakes too big, and to try and never make the same mistake twice.
GLTA as we ride the tail end of this story out.