Chukrut Budrul/SOPA Images/LightRocket via Getty Images) Three US states have said cryptocurrency platform BlockFi's Interest Accounts may be a security under state regulation. New Jersey, Alabama, and Texas said the crypto platform did not register its BlockFi Interest Accounts with regulators. BlockFi CEO Zac Prince says that the interest-bearing accounts are lawful. Sign up here for our daily newsletter, 10 Things Before the Opening Bell. Three US states have said cryptocurrency platform BlockFi may have violated securities law by offering its interest-bearing accounts within their jurisdictions.