Bitcoin is not created in order to send money cheap. It is created in order to send money peer-to-peer, anonymously and fast compared to other processes that are used right now.
There will be always needs for something different such as cheap transactions or more anonymous transactions, etc. This is the reasons why projects continue to be evolving and provide different characteristics to the users.
Bitcoin is not going to die as Gold didn't die when Fiat currencies became mainstream and people started exchanging with them.