CoinBig exchange is another centralised exchange launched in 2018, though it was registered in New Zealand in 2016 but official trading operations began in 2018. As a centralized exchange, CoinBig offered several trading features like OTC trading, Altcoins Derivatives and even spot trading. I wasn't impressed with the interface of the exchange, as the website wasn't built with total professionalism, the website isn't responsive, the response time is very slow and sometimes no response, the only