Big corporations and banks are already trying to find how to make money out of this. They already how useful Bitcoin is, but they still haven't decided how to exploit as much money as possible.

There are are attempts to create their own digital version of a cryptocurrenty, while trying really hard to discredit Bitcoin.
This is the main strategy right now with Facebook and JP Morgan in the front of the race.

Every government, bank and corporation is calling blockchain a great technological advancement, but at the same time they bash Bitcoin and anything that has to do with it.
It is most clear that they would be happy to see Bitcoin fail as they can't make the most out of it, even with trading desks or exchanges they recently bought.

Banks and governments will keep Bitcoin on the grey zone for at least the next 5-10 years, until they either defeat it by creating something new that will be publicly accepted, or accept defeat and accept Bitcoin as a universal currency.