SEC filing triggers 70% drop in marketing company stock [https://www.thestreet.com/.image/t_share/MjE1NTk2MzIzOTUxMzU1MjQ3/gettyimages-2212289609.jpg] SEC filing triggers 70% drop in marketing company stock Confusion over Ethereum-linked stock registration triggers massive sell-off despite no insider sales. [https://www.thestreet.com/crypto/markets/sec-filing-triggers-70-drop-in-marketing-company-stock-]