Four decades of blind signatures show that one algebraic trick, letting someone sign what they cannot see, protects ecash and CoinJoin.
Bitcredit is the concrete protocol reconstructing bills of exchange on Bitcoin, closing the credit layer gap that prior posts have diagnosed.
Bitcoin plus Nostr creates programmable money that solves software monetization through micropayments respecting user sovereignty.
DigiCash, e-gold, and Silk Road failed through centralization and poor OPSEC. Bitcoin succeeded through decentralization, open source, and properly aligned economic incentives.
