I do not know in future but it may happen I am not sure. At present in cryptocurrency world, btc is the leader for all coins. Yes there are many cryptocurrencies there, but no one can touch the Bitcoin price. And the usage of Bitcoin is very easy. All gamblers are like to use this Bitcoin for betting. So I think now no other currency will replace Bitcoin.
Actually it is the how many people that it already reached. When a new cryptocurrency is created it needs some people to back it up. Just like litecoin and etherum who have been there for a long time. But still bitcoin is like the mother of all. So it is not possible to happen that they will be stepping on their mother.