What criteria can be used to assess whether a specific cryptocurrency is allowed based on Shia teachings? I have heard some cryptocurrencies involve prohibited activities, so how can I identify if trading a specific cryptocurrency is permissible or not?
Our great Maraaje' of Taqleed have different opinions on cryptocurrency as some of them allow dealing with it, and some don't allow while few of them don't have any verdict yet.
Those scholars who allow dealing with cryptocurrency include Ayatullah Sayyed Moosa Shubairi Zanjani, do not differentiate between cryptocurrencies as far as dealing with it does not contradict or break the law of your country and it should not harm others.
Wassalam.