先日のG7が宣言「ランサムウェア攻撃に対抗、crypto-assetsの規制必要。ランサムウェアの多くがcrypto-assets利用」

“These attacks, which often involve payments in crypto-assets,
jeopardize essential functions along with our collective security and prosperity.
We affirm our resolve to combat this threat collectively as well as individually,” the draft said.

https://www.reuters.com/article/us-g7-stablecoin/facebooks-libra-must-not-start-until-properly-regulated-g7-draft-idUSKBN26X21I