I totally agree with you. Banks on my country charge for everything; from your ATM card to bank transaction alerts. In fact, if you leave your account for six months with 5,000 inside it, by the time you go back to that account they will have deducted everything and pinned it on account maintenance charges, ATM maintenance charges and so on. It is quite disgusting, the means with which they steal from us.
The cryptocurrency world is truly a threat to the banking industry and they will not take it lying down. Big business too will definitely not like the idea as they depend on the goodwill of the banks to keep their mergers and acquisitions in a balanced state.
I feel that the banks using governments as stooges will retaliate and create ways with which this freedom can be again chained.

Like you said, we have to be prepared for it will definitely come. The day a country decides to run its currency backed by a cryptocurrency, that day the assassinations and dark alley fighting will move into the open and true war will begin. I just pray crypto wins. I love the freedom it offers.