What can make a token in MEW disappear?
lately i heard from some friends that he lost the token at MEW, he said that he had entered on the right site ie
https://www.myetherwallet.com/which is happening is exposed to phishing, is there any other cause besides phishing?
The phising site really looks exactly the same as the original one that your friend aren't aware that it is really not. There are very simple signs and the obvious one is the green secure lock which is only present on legit sites.