Suspending bank accounts is not the solution..
Did banks forgot that bitcoin can be bought with cash in a nearby ATM ?
I think that you are living in USA or Japan country that is why you are commenting about bitcoin ATM, when all of them know that their is no debit card for Indian users and their is no Bitcoin ATM.
But still i have seen lot of my friends accounts are got blocked from their respective bank and when asked they just gave reason of cryptocurrency trading but some friends who have doing trading and even showing transaction in IT so they just showed all details and their accounts got cleared and they are now able to trade. So this should be problem with illegal money users who are trading to evade tax.