Signal is still not a good way for phishing/ransom anyways. Users would either have to already have the attacker in their contacts list or enable sealed sender

Signal is still not a good way for phishing/ransom anyways. Users would either have to already have the attacker in their contacts list or enable sealed sender. Enabling and funding a cryptocurrency wallet is going to be difficult. Even for WeChat who's payment service is popular it only captures 40% market share and as a result generally people are more educated about the risks.