Yes, it is the first crypto, but at its present state, it definitely cannot fit into every area. This is my opinion, if you have something contrary, I will definitely love to hear them.
How can you say not fit into other area? As far as I know bitcoin empowered a great peer to peer method for everyone. I know altcoins are good to, but what you want is impossible and people will always have space for bitcoin no matter how they support altcoins. I am betting many here have altcoins but majority of their portfolio still bitcoin.
There are some places in somr countries already accepting bitcoin and its only a matter of time before we can see it expand.