To be honest, it depends on how responsible a student is. I myself is a still a student who relies in Bitcoin to help me finance myself but I for once haven't forgot about my studies and had an average grade of B+. You should consult your students and approach them to give them some advice. It's not Bitcoin's fault but it was students entirely. 
Indeed, every step that you take will reflect the things that will return to you, I believe if you can handle yourself and you have strict time management, you can be still a productive lerson academically speaking or not, it just a matter of self-discipline and time management, try to be in the place where the consequences of what you did will reflect I think it will lessen the procrastination that you have in your system.