Venezuela's Binance users are experiencing difficulty accessing the exchange website. It is unclear whether it was blocked intentionally or not, and what impact it will have on the country's monetary system.

The bigger question relates to whether Tether would bow to Washington's sanctions if asked to do so — perhaps fearing recriminations on its other lucrative operations.

Rpay will indefinitely stop all fiat deposits and withdrawals in Venezuela, Argentina, Colombia, Ecuador, Peru, and Panama. The founders cite banking problems.