Blockchain

Core Utility: Immutable Logging

The real value of blockchain isn't cryptocurrency or DeFi speculation — it's immutable, non-deniable record-keeping.

For sensitive information, blockchain solves one specific problem that traditional databases can't: logs that can't be modified after the fact.

Log Type	Traditional DB	Blockchain
Access logs	Admin can alter	Immutable once written
Deletion logs	Can be purged	Permanent record
Audit trails	Tamperable	Cryptographically secured
Chain of custody	Trust-dependent	Trust-minimized

Traditional logs depend on trusting the administrator. Blockchain removes that dependency. If you need to prove who accessed what, when — and nobody can retroactively edit that record — blockchain is the right tool.

Where It Doesn't Belong

Most "blockchain applications" are databases cosplaying as distributed systems. If you trust the operator and don't need immutability, a Postgres table is faster, cheaper, and simpler.

My Take

Solution looking for problems in most applications — but the only solution for non-deniable logging in adversarial environments. The narrow use case is real. Everything else is databases cosplaying. See Wiki for Crypto Sovereignty.