It's obvious why banks want bitcoin gone- if everyone was accepting bitcoins there would be absolutely no reason for banks to exist any more!
I still believe that bitcoin is the currency for the future and one day we will all be free from the hold that banks have over us.
An interesting article about the Senate approving bitcoins can be found here:
After the officials gave their opening statements, Carper's first question drew a parallel to the Internet. He pointed out that in the early days of the Internet revolution, many people raised concerns about illicit use of Internet technologies. Yet in the long run, he argued, the Internet has had a hugely beneficial effect on peoples lives, making possible previously unimagined services like Facebook and YouTube. Carper wanted to know if the witnesses saw Bitcoin in the same light.
Jennifer Calvery, director of the Financial Crimes Enforcement Network, agreed with Carper. "Innovation is a very important part of our economy. It's something for us to be proud of," she said.