In your analogy, "the internet" would be cryptocurrencies. And the internet has seen many early players surpassed. http, MySpace, Geocities, even Yahoo used to be the biggest search engine before Google. So yes, there is a lot of scope for Bitcoin to become antiquated, and maybe cryptocurrencies as we know it will become antiquated too. This is why gold persists for thousands of years -- it is analogue. Technology becomes obsolete much more quickly.

Bitcoins value is in the network security. As long as hashrate is high its hard to see something else taking its place. Watch the hash.