Banning a crypto trading or ask banks to not deal in cryptos never works coz people will find a way to circumvent it. You see the liquor ban in Gujarat, Kerala and Bihar that gives you an idea how ban works.
As the ultimatum last date is reaching that is 5th of July people start panicking that results in market slowdown and a dip in prices.
Govt stands to lose on Income Tax on these incomes, it stands to lose being an early adaptor to this amazing technology and while other countries make bigger strides in crypto-block chain space, we just watch and fret.
But I feel Govt will not ban cryptos, but may enforce some tough regulations on it. Hoping for the best and keeping fingers crossed :)