The FBI published a questionnaire for potential victims of QuadrigaCX on Monday.
The U.S. DOJ is reportedly probing Tether and Bitfinex over whether they artificially boosted bitcoin's price using the USDT stablecoin.
Russian intelligence agents allegedly used cryptocurrencies to help fund an "influence and disinformation" effort, the U.S. government said Thursday.
Twelve Russian officials indicted for hacking into Democratic National Committee email accounts allegedly used cryptocurrencies, the DOJ announced.
U.S. regulators don't aim to suppress innovation in the blockchain industry, representatives said during a panel at CoinDesk's Consensus 2018.