Illustration: Lindsey Bailey/AxiosThe courtroom saga of BitMEX, a pioneering cryptocurrency exchange, continues on, as the Department of Justice announced on Wednesday that the firm pled guilty to one count of Bank Secrecy Act violations.Why it matters: Companies in the blockchain space skirted laws requiring them to check the identities and backgrounds of their users in the early days when it seemed like no one was paying attention. U.S. agencies are paying attention now, and they are aggressiv...