- Public key crypto was invented in 1976

- Bitcoin was invented in 2009, 33 years later

- Monero was invented in 2014, 5 years later

- Hidden amounts (RingCT) was introduced in 2017, 3 years later

- Full chain membership proofs will be introduced in 2025? 2026? -> 9 years later

The perfect timeline: From 1976 to 2026. 50 years apart from public key cryptography to perfect privacy anonymous black market money