Haha. What are you talking about? You've already admitted that a) you hadn't publicly announced your coin b) you've got workshops coming up, but haven't had any yet c) you have journalists on standby, but again, they haven't actually done anything yet.

In other words, you've done nothing in the public domain, therefore there's no trademark infringement here, unless you've registered the mark, which you haven't.

Good luck with that C&D buddy!