I know that everything in life comes with some form of risk and Bitcoin is not exempted but magnifying the risk of Bitcoin in a discussion that focuses on holding for long is inappropriate because Bitcoin so far seem like a safer investment for a long time view. Most of the risk associated with Bitcoin affect those looking for quick profits like many people already stated here.
while it is not totally good to magnify the risk associated with bitcoin investment most especially as it regards individuals intending to buy and hold, it's also necessary that they get to know the possible risk involved so they can better protect themselves against any form of attacks that could come there way and also know the sources and means of the risk and attack.
While anyone intend holding, he has to be aware that his wallet could be hacked and all his holding taken away, he also has to be aware that the volatile nature of Bitcoin entails that the price can come down momentarily and that better enable him to manage whatever reality that comes while holding. I guess the idea on hyping the risk involved in buying and holding bitcoin is for the good of the person buying it so he could count all the cost and hold on appropriately.