> someone comes up with a playbook convincing nontechnical users they need to send mobile coin to them in order to keep using signal. This sounds pretty unlike

> someone comes up with a playbook convincing nontechnical users they need to send mobile coin to them in order to keep using signal. This sounds pretty unlikely, as long as signal does not integrate a payment processor (and they've made no indication they will) the majority of users will not have enabled or funded their cryptocurrency wallet(s) (whichever cryptocurrency they settle on). Funding MobileCoin requires steps of non insignificant difficulty, not to mention Signal's trust model of using your contacts by default.