Yeap, I think so: most of ones who talk in such topics are not so experienced and it is always important to remind that there are underwater stones. Of course many are interested in volatility and some can earn something with it, but it is easy as to earn sometimes as to lose mostly all deposit and occasionally even more, especially if to trade not only on your money. If some are warned and trade with open eyes and still want to risk they can decide themselves after that. And they will not think that they were misinformed.