Interesting question, really.
If you believe in something, have faith, whether it is automatically religion?
I don't think so.
You can also believe in your company, country, even spouse or kids but this is not connected with religion.
People can even believe in God without need for religion.
Religion is, by definition, institutional and includes church services, the priests, shared spiritual values etc.
We can believe in bitcoin but bitcoin will never replace the institutional faith and service to God.