I doubt, if Bitcoin would upset the Apple cart .... The Banks already started to shift gears to neutralize the threat, by investing in developing "Private Blockchains"
These "Private Blockchains" would be in a better position to adhere to the KYC/AML regulations and they will incorporate all the best parts of the Bitcoin Blockchain and the other Alt coins.
We have done the leg work for them, they just need to cherry pick the best parts and create the ultimate "BankCoin" backed by their "Private Blockchain"
For them, this is only a small bump in the road... We need to decide what route we will take in the Crypto currency jungle.
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