Its better experiment about exchanging activities to different platforms to know where or what is the better way to exchange. I think exchanging bitcoin to altcoin cannot make that big profits we expect. Mostly because bitcoin has higher value than those altcoins. We can still do it sometimes maybe its just about timing as well.
Well you are right that exchanging bitcoin into altcoins could not give much profit but this is only for the inexperienced people because the new people always makes mistakes due to which they can't adopt this method, but i have seen only few people who are involved in this strategy and they are making very good amount. But i will not suggest this because a little mistakes can destroy your whole asset and you will left with nothing.