U.S. federal authorities seized $400 million in cryptocurrency, cash, and real estate linked to darknet bitcoin mixing service Helix

The first and largest cryptocurrency, spanning its price and adoption, mining, protocol politics, and its contested role as digital money and inflation hedge.

Lawsuits, settlements and criminal cases brought by regulators and prosecutors against crypto firms and individuals.

Rules that force crypto businesses to identify customers and report suspicious transactions, from KYC mandates and the Travel Rule to mixer enforcement.