Todd, it is unlikely you can trademark BitcoinATM.  BitcoinATM is a descriptive term and probably cannot be trademarked.  The only thing you own is the domain name.  Google "Trademark Act Section 2(e)(1), 15 U.S.C. §1052(e)(1); see TMEP §§1209.01(b), 1209.03 et" for more info.