Just because asians are getting into the bitcoin doesn't mean all of the rush came from them. Do not forget that bitcoin is a volatile currency which means that if koreans and japan wanted to get more bitcoins and the rush came from them, it also means that a lot more people followed them and bought as well, no one can handle that much increase all by themselves when others are trying to sell, which means whole world wanted to buy WITH them.

However, he is right that the prices are a lot closer to each other on the markets, I do remember the times when markets had so much arbitrage differences. It had happened in the past for sure but, from those occasions market had bounced into new high too. Those things are not the right indicators to predict the bull-run and its end.