Quantum‑safe multisig vaults

Supply‑chain zero‑knowledge audits

Data‑availability layers for modular rollups

Web3 social graphs with portable reputation scores

Carbon‑capture storage tokenization

On‑chain micro‑pension savings plans

Voice‑cloned music NFTs with fan governance

Game‑theoretic insurance pools for validator slashing

Bitcoin tickets for space tourism

Predictive maintenance tokens for heavy machinery