It can happen because Bitcoin has many disadvantages such as slow transaction speed, small size of block, high fee. But I believe that the developers will improve it
Guys already there are more than 5000+ cryptocurrencies are in global market. Among 800+0 are really great cryptocurrencies which have really great value compared to bitcoin. But till date Bitcoin is the first and most loved projects by its users. In coming future if user turns there mind, then it can be happen that any other cryptocurrency can take place of Bitcoin.
But still, Bitcoin is unique and will be memorable till last as a pioneer of cryptocurrency.