There is quite a bit of hoop jumping to do, I'll agree. More steps than there should be, but I think that's the problem of trying to bridge two systems, the old fiat way and the new crypto blockchain. The one doesn't want to let go nor let the other make grounds, so governments are trying to dictate how you buy in. And depending on where the exchanges are, they live by the rules set in their country and then abide by those set in the countries of their users. I think Coinbase is based in the UK.
I had Coinbase tell me the same thing. It had to do with the company that manages the transactions of our accounts, which isn't the bank, apparently, but some other company. I'm told they're the ones who won't allow me to use a card, so things come straight out of my checking account, but there's a seven day wait first. Really dumb, and hard to plan in advance.
KRW is the South Korean Won. Not sure how its listed elsewhere.
Thanks again. I will see how it all pans out in the future. :-)