It is not bad at all,,, I think I already saw this news though and I commented that it sounds like a really low price for tax if I am honest. Imagine if I manage to get my 1 BTC safe and Bitcoin hits 100,000$! I would be SO happy to pay 20,000$ as tax and happily keep the rest free and no need to worry. Good rate I must say.
Especially if there is no tax on crypto transactions whatsoever, then its a really great deal.
I think the Korean government won't let people not pay the tax, and they will investigate every people, no matter if they use crypto or not to pay the tax. The tax is important to them to help the government grow the country's economy, especially after their country gets attacked by the Covid-19. I hope that the government can give a fair tax to their people so they will not be a problem for everyone who has an income from the crypto trading.