Just to understand, I do not see the possibility of short selling on exchanges...
It is possible but it will be with a loss all the time.

That is not a move of someone who has the experience and knowledge in trading. People or traders that always let emotions play a role in what they do as well as those with weak hands will end up with losses. A coin dump is not something to which we react with panic, it is something that we consider a good time, to buy, an opportunity.