Failure atlas
Diem
A proposed currency and wallet system that did not launch as designed.
What to keep
Diem, earlier called Libra, was a permissioned design with a reserve and a known set of members.
It faced regulatory opposition and did not become a public payments network. The association later wound the project down.
A careful design and a licence are different facts. This page records the second.
What this is not
Not a complaint, not a price chart, and not a complete history. Primary sources outrank this summary.