New coins devs always say that their coin will become very popular. It's just an advertising. Now there is no coin, which will become more popular than bitcoin. But there are coins which are much more usefule than bitcoin
They can get popular but they can never be like bitcoin. Even ethereum and litecoin couldn't do this. So it's better stop dreaming about this kind of things. The only deal here is getting the ones which carry the potential to rise.
it's just a shit if any altcoin can beat the bitcoin, because until now it's not proven and I think altcoin will not be able to beat the bitcoin until whenever except when all the cryptocurrency coins are destroyed.