Bitcoin might not be replaced by anything similar in concept - what I mean by that is another decentralized crypto. But there is high chance of disturbing BTC market by project like national cryptocurrencies. I have on mind recent idea of Chinese Government - they are currently hiring blockchain specialists to help them launch new cryptocurrency.
We may find the similar project in Canada, The Bank will be trying for making another concept, but the purpose will become the competitors for bitcoin soon. Blockchain was becoming the double edge knife.