Facebook's cryptocurrency project announced in 2019 was called Libra. Facebook introduced the project as a proposed global digital currency supported by a consortium of companies and organizations.
Libra was intended to support payments through a digital wallet originally called Calibra, later renamed Novi. The project attracted major attention because Facebook proposed using a reserve of assets to help support the currency’s value rather than relying on a single national currency.
The initiative faced intense regulatory and political scrutiny, and several founding partners withdrew. In 2020, the project changed its design and was renamed Diem, but Libra remains the correct answer for the name announced in 2019. Bitcoin was an unrelated decentralized cryptocurrency, while ZuckCoin was never the project’s official name.