I think you are generalizing all Asian countries just because China banned ICOs and other exchange and trading sites. You need to study a little about geography because Japan and South Korea are dominating the btc trading in the cryptocurrency market.
Japan has fully legalized Bitcoins and crypto-exchanges, but the situation with South Korea is a little bit vague. I have seen some of the South Korean users here claiming that Bitcoins are legal there, but then I have also read articles claiming that the government has banned the participation of South Koreans in the ICOs.