The NSA whistleblower launched an unapologetic verbal attack against the BIS chief in a series of tweets. National Security Agency consultant cum whistleblower Edward Snowden has fired back at the chief of the Bank of International Settlements, Agustin Carstens, for his claims that crypto has lost to fiat. “That battle has been won,” Carstens said, The post Edward Snowden Fires Back at BIS Chief Amid Claims That Crypto Has Lost to Fiat first appeared on The Crypto Basic .