Actually, bitcoin can not make banks disappear as it is the primary material to convert your bitcoin/fiat money vice versa. Also, bitcoin also needs bank thus, disappearing of banks won't happen wether the fiat are a bout to dicrease its volume.
I, too, adhere to this opinion and at the same time I can say even more that banks adopt the technology of blocking and so I would be able to withstand new challenges and adjust to new ideas in the field of finance and economy.