OKEx is the leading global bitcoin exchange. Secured with bank-level SSL encryption and cold storage. Currently, according to CoinMarketCap statistics, OKEx is ranked 5th in total trading volume 24 hours (over $ 1 billion, the largest transaction is BTC / USDT),OKEx provides a safe, it might be a little overwhelming for complete beginners who might do well to start at an exchange like Binance which doesn’t offer quite as many options for trading and has a simplified trading screen.