Bitcoin certainly poses a threat to banks, when banks are used, bitcoats and crypto payments as payment here and abroad, then banks can no longer charge a fee for this transaction. What can lead to a large number of banks closing.

Of course, banks can disappear! But this in my personal opinion will not happen in the coming decades, and maybe never. It is not profitable for the states.

It does pose a threat to banking system. They're afraid of being made obsolete and more people are choosing blockchain technology because its decentralized. It allows people to trade directly with each other, cutting out the need for a third party or a middleman just like what banks does.

Bitcoin can be considered as a threat to the banks knowing that it has all the features and capabilities banks have and it is way more better. We should always consider the fact first that banks are legal in the whole world meanwhile bitcoin is not so that's a disadvantage for bitcoin but still it is slowly snatching its way to the world market making it possible for bitcoin to kill banks in the future.

For sure, it's a bitcoin for people to get money and of course it means that the person needs money, but somehow they use the bank to keep their money coming from bitcoin, and of course they will it is in the bank so they can control it and another is still needed by the banker so that they get to bitcoin will keep

It is unlikely that bitcoin will destroy banks. Most likely, bitcoin and blockchain will help to modernize and optimize the financial system in the world. I think there will be fewer Bank branches, and fewer people working in Bank offices. Everything is automated.

Comparison of kodak with banks  is not fair.  Kodak did not change itself with the  change of time so it failed because with the use of digital cameras the camera films were of no use and kodak was just producing  and was just dependent on the old technology.  Kodak did not adopt latest technology that is why it failed.
When we talk about bank ; banks are already diverting their activities towards digitalisation of their transactions.  They are motivating their customers to use more and more digital transactions. 
Major part of their transactions has been diverted towards digital banking.  Even we are hearing news about  creation of crypto currency by the banks. 
So banks will never fail;
But I fear speculators and big whales may force bitcoin to die because of their greed to snatch money from the true small investors.

Obviously, they lose with digital currencies, because they are not under their control, since they are not what they can invest and earn

To be honest, i do not think that there is gonna be a "war" just like many people said before.

It is only fiction for a lot of people in here, and it is almost impossible to see it happening in a near future.