I am also a non-dispen myself (Reformed Baptist). Out of curiosity, as a Presbyterian, are you more in the idealist or partial-preterist camp? Some guys in our church are exploring Bitcoin and also discuss the classic Reformed Amil view of Revelation and the resurgence of the partial Preterist and Post Mil views. This certainly makes them more willing to learn about Bitcoin as they are not worried about taking on some satanic mark or losing salvation.