Wait! Ill seek and need to look into my crystal ball 

This question is totally senseless yet no man can able to predict on the future but if we do just base on our own common sense on the current things happening on the market then its clear whose the strong contender that can really possible dethroned bitcoin into its current place which is ETH but still not an assurance thing to happen but theres a possibility or even on some altcoins in the market. No one really knows.