ビットコインなどの不透明で不安定な暗号資産の存在が
安定したCBDC（デジタルアメリカドル）を求める声を高めた


ブレイナード理事　スピーチ
https://www.federalreserve.gov/newsevents/speech/brainard20200813a.htm

financial stability, and the role of currency in society. This prospect has intensified calls for CBDCs to maintain the sovereign currency as the anchor of the nation's payment systems. Moreover, China has moved ahead rapidly on its version of a CBDC.