if it was not against their religion or does not violate any of their teachings, i think they can do business with crypto, since crypto is an investment, i see nothing wrong with trying crypto, we can see the moslem brothers are good businessmen, they have so many investment, whether it is a property, car or crypto investment, i am sure they will do good in joining crypto trading.
However, in my opinion, since so much is happening in these regions of the world, letting Bitcoin operate will not make things further worst rather than doing some good to the economy as well.