The investigation, still in its early stages, is examining the governance structure and membership of the Libra Association. The purpose-built, independent nonprofit is meant to govern the digital currency. Founding members include the likes of MasterCard, PayPal, Visa, eBay, Spotify, Uber and Lyft. According to Bloomberg, regulators fear that the way information will be exchanged and the use of consumer data could create "possible competition restrictions."

The US Treasury has already expressed its "serious concerns" regarding Libra. In particular, it noted fears that the digital currency could be misused by bad players, like money launderers and terrorist financiers. Facebook promised it won't make Libra available until regulators are onboard. That will likely be an ongoing and uphill battle.