OKEX is currently supporting a variety of coin and tokens, including Bitcoin (BTC), Bitcoin Cash (BCC), Ethereum (ETH), Litecoin (LTC), Ethereum Classic (ETC), EOS Kyron Network (KNC), IOTA, Centra (CTR), NEO, SONM (SNM), .. and many other coin.
The main reason for that is that cryptocurrencies tend to be a lot more volatile than the traditional forex pairs, which rarely experience daily moves of more than 1-2%.