the only fault you are is not able to control the emotions or can not be patient, if you hold it then you will not lose and definitely profitable, ethereum is the most potent altcoin in my opinion because ethereum platform much in use by the new altcoin
You are right there but the poster doesn't say it is because of emotions. He use an example of the currency he bought and he loss with it. Traders need more knowledge to be able earn and get a better skills. The bottom line is be patient especially if you are holding a top coins.