https://www.reuters.com/article/us-facebook-libra-basket/u-s-dollar-to-be-main-currency-underpinning-facebooks-libra-spiegel-idUSKBN1W522K

The U.S. dollar will make up 50% of the basket of currencies backing Facebook's planned digital coin Libra, with the euro, yen, sterling and Singapore dollar comprising the rest, Der Spiegel reported, referring to a letter from Facebook.