Bitcoin maximalism has immediate parallels to religious doctrine that regular currencies do not.

1) Divine creator whose existence is impossible to prove

2) A holy book: (whitepaper) that's taken as absolute truth and therefore doesn't require any revisions or updates. Proposed changes to core beliefs create split factions (BTC v BCH, Old v New Testament, or the Shia-Sunni split in Islam).

3) Monotheism: Belief in the primacy of Bitcoin blockchain over all other competing chains, and warning of divine punishment for apostates (NGMI).