Riot Blockchain is planning to launch a regulated exchange in the U.S. to offer crypto banking and trading services.
The legal woes of biotech company-turned-crypto miner Riot Blockchain don't appear to be slowing down.
Riot Blockchain has received a subpoena from the U.S. Securities and Exchange Commission.
After its blockchain and bitcoin mining pivot, Riot Blockchain has been hit by three class action lawsuits in the U.S.
