I don't think that there is a point in masters degree in digital currency, a degree in CS would be more useful. You could take digital currency classes and major in Computer Science. A degree in digital currency could be an option in 5 or 10 years.
So do you think a master's degree in computer science will offer wider choices for career path rather than just focusing on digital currency?
If you get a masters degree in computer science, you will get more paths for your career in digital currency and the others computer science related subjects. But, if you just focus on specific thing like digital currency, then you only have your career path on that, and get little chance to work on non digital currency company.