Facebook's Libra cryptocurrency project branded of ‘serious concern' by Federal Reserve

However, the US Federal Reserve wants Facebook to put its foot on the brake until a number of concerns have been addressed.

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"Facebook has a couple billion-plus users, so I think you have for the first time the possibility of very broad adoption," Powell said. "It needs a careful look, so I strongly believe we all need to be taking our time with this."

Singapore, too, has concerns over the Libra project. Earlier this week, officials demanded that Facebook provide a more thorough explanation of Libra in order for the country to decide whether regulators need to investigate the proposal. 

However, Singapore's Monetary Authority of Singapore (MAS) said it is "open" to financial innovation, on the proviso that Facebook does not pose a threat to the local financial ecosystem.