Even if platforms and exchanges are decentralised there is still the scope of potential lawsuits where governments have banned those exchanges and they are not moved offshore. All things said, where will these Korean and Chinese investors go after their regular exchanges close?
About the chinese,they have moved. An article by the Merkle:
https://themerkle.com/chinese-exchanges-move-abroad-in-search-of-friendlier-regulation/If governments decide to ban exchanges which is essentially the most they can do effectively, trading will still happen privately, either on a p2p trading platform such as localbitcoins and paxful, or even through trading groups or even in real life.
If more regulations roll in then I think current exchanges will lose a lot of popularity due to over the top KYC and AML measures, as well as batrading ns imposed by regulators. This is why I think decentralised exchanges will become more popular in the near future, if they can be effectively implemented.
For starters bittrex and poloniex lost their entire rep because of this. For coinbase,well i don't know but they have always been compliant to regulations. Binance has been doing well but one day or the other,the end will come where they will be forced to regulation.
Decentralized exchanges have been shit all this far. There is a need for emergence of a good decentralized exchange,otherwise P2P trading platforms would be the only go to option.
South Koreans are loyal to their government so its likely that they will never move,and they have already started implementing regulation if I am not mistaken.