I would argue that it is very likely that bitcoin will be succeeded by a superior crypto currency. Its a questions of when not if. Everything evolves and I cant think of a single thing that was not replaced by a 2.0. If "Satoshi" was still actively developing bitcoin I would expect it to retain its dominate position for quite some time. He is not. And he left pretty early after its birth. I don't think bitcoin is addressing its fundamental issues quick enough to not be replaced in the not so distant future.
Yes, you're right that Satoshi ain't developing it coz he gave birth to Bitcoins and we, the common people have adopted, developed and are running it currently... So, backed by people like us only, we need to take the responsibility of either having BTC as the number one cryptocurrency as it's the "PARENT" of all that are coming currently, or will need something more out of the code Satoshi gave us, with some different value of the same thing...
We need to make it possible for each and every person in the world know and adopt this protocol in their lives and take advantage of it.