The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Bitcoin (25 members)
- Bitcoin Security (24 members)
- Blockchain Technology (8 members)
- Consensus Mechanisms (2 members)
- Cryptocurrency (1 member)
- Cryptography (1 member)
- Cybersecurity (4 members)
- Cypherpunk (1 member)
- Pages with broken file links (26 members)
- Privacy (1 member)
- Scalability Solutions (1 member)
- Wallets (7 members)