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. 
Thank you for your honest reply! I am glad that you and everybody else got the point. They are actually the ones who told me that they kind a feel lazy because of the deadlines so i told them that time management is a must. That though they earn a lot, still they need to prioritize their studies.