Bankers can not influence the situation with bitcoin. Bankers can take an unlimited amount of Fiat money, but to have access to bitcoin they can't. Besides who wants to borrow in bitcoins if the price can rise to it. Such a loan can result in bankruptcy.
this is really complicated to differentiate between bitcoin and bankers. I think both have a different aspect, bankers are basically involved in the traditional banking and bitcoin is involved with the virtual area, but in the future, bankers also will deal with bitcoin.
Yea, bankers will have to deal with bitcoin in the future but bankers can not change the situation in bitcoins. Bitcoin is anonymous while banks is not, both of them has a different aspect concerning about the volatility in both areas.