What you are talking is just temporary impact of removing Korean Exchanges. Sooner or later, market will and has recovered. But there is another aspect we all are missing at the moment which could seriously effect long term sustainability of Bitcoin and that is...
"So far CoinMarketCap was taking Combined Mean to determine price but now in order to lower deviations, it has removed extreme values. But was it necessary? I will say no. By removing Korean prices, CMC stressed on the idea that US/UK prices are more accurate than Asian prices. After Korea, we could see Indian, Chinese or Japanese exchanges being neglected by CMC. Are we going on the path of declaring West to be the power of Bitcoin? Are we diluting decentralization essence of Bitcoin? Maybe..Maybe.."