I don't think that onecoin will even have any major impact in crypto world.... it's just another "fake" coin that was made only for people who have it to flip a buck. Nothing special about it....

I also wouldn't advise you to even look at onecoin you need to inform yourself about the alts and what could be a "real deal" and which ones will just fade away.

It will be hard for any altcoin to to take bitcoins place (at least for now).