I've heard that some bank in the South Korea want to start accepting bitcoin, but i'm not sure about this information

I have no direct knowledge about bank acceptance but my colleague who is now earning from
Bitcoin had her transactions made thru bank so I guess it is accepted. And as far as I know there is no policy prohibiting the same.

thats right, No banks accepts bitcoin. but we still can investing bitcoin. its common.

Maybe for the moment there is no bank yet ready to accept bitcoin. Some countries even close your account if they found out that the source of your funds came from cryptocurrency. Im not really sure why they hate crypto this much that will do anything to shut it. I just hope these banks will find a way to adapt crypto instead of fighting it.

  :oHere in our country, I guess like nothing else; all we can do is to convert our bitcoins in fiat money, even if not, when we cash out it is automatically converted and withdraw from a bank. So there is still no bank that accepts bitcoin for making a deposit in our place.

Currently no banks accept Bitcoins in its form. They trade/transact in government backed fiat currencies only.
Although Bitcoin is a legal payment tender in some countries. Your traditional banks do not directly deal with Bitcoin. There might be some intermediary who convert Bitcoin to local currency and vice versa.

I do not know, No bank receives bitcoin, but with the majority of banks you can withdraw money to the exchange and buy bitcoin.

Most of the countries on the world did not ban Bitcoin, only some countries and one large country (China) banned Bitcoin because the government of these countries feel Bitcoin as a threat for the future of their countries.
Recently, few banks accepted Bitcoin for investment and loan from Visa/MasterCard.
Example Liechtenstein bank opens up cryptocurrency investment for clients in the last month, it proved Bitcoin can get accept from the bank in the future.

I do not think that we will accept bitcoin. Banks currently only trade on the legal currency. They may also not accept bitcoin because only a few governments accept bitcoin. Most countries are wary of bitcoin