As fun as it would be to become a "KRX billionaire", I really think it would have been better to move the decimal place one or even two steps to the left. The main problem with having this many coins is that one coin will be worth much less than 1 satoshi (at least initially) which may cause problems when/if it hits an exchange.
KRX uses the same config as
https://coinmarketcap.com/currencies/bytecoin-bcn/ so this is worth a look at to see what could happen in the future.