One of issues for Cryptocurrency transaction is a bank account as I stated on a previous article and this is a kind of real name issue practically to avoid any money laundry or abuse of foreign currency control law.
You need to verify why you need a bank account to open, and usually they used to ask a income sources(like employment contract, or commercial contract) to an individual and a tax certificate for an entity.
Even all of banks may refuse to open a bank account if you said it's for cryptocurrency transaction at a exchange from the 30th of January, but it's happen already.
You can set-up a company or branch to open a bank account easily, and I can provide a service for this without you in Korea as your proxy.
Please contact me firstname.lastname@example.org always