Actualy in that case's thats making a transaction only in one single exchanges,theres a positive and negative impact to the investor,the good impact is  maybe in thats situation we easily to get all crypto coins because they are only in one exchanges ,but how about if the processing fee they will rise,we are no choice to find another kind of trading exchanges, we become freeze into there exchanges rules ,although the negative impact thats theres no competition in crypto exchanges market because all will depend in one single exchange only.