Banks depend on a huge customer base of uneducated consumers to take out huge loans with crippling interest rates and i feel that bitcoin, even if it has lost some people lots of money, has at least opened their eyes into understanding financial markets, financial solvency, and long term financial planning.
i don't think bitcoin is much of a threat, but involvement within it and realizing that youre under the thumb of bankers, well that is something that bankers and traditional financial markets will never allow