The technology is something and Bitcoin is something else. The banks are not interested in Bitcoin.
They have the control over the financial system. They are interested to develop their systems, yes.
Bitcoin itself is an e-currency and a small one and nothing more.
Do not forget that Bitcoin is used by around of 2.5-3 mil. people which is nothing considering the world financial market. Of course, many people have several addresses, and some have dozens of addresses so the ones who own BTC are less than that.
