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Bithumb is a cryptocurrency exchange that is based in Seoul, South Korea. The platform was founded in 2013. It allows users to buy, sell, and store various cryptocurrencies. In South Korea, Bithumb is one of the largest exchanges, and it boasts some of the biggest crypto trading volumes.
Hubi is a centralized Chinese exchange describing itself as a Global Digital Asset Exchange. It was established in 2018 to provide currency, OTC and stable coin trading. Major assets provided by Hubi are BTC, ETH and USDT. 
In 2007, "The Rock Insurance Co." was born as a Virtual Insurance Company in Second Life, the first one of its kind. Since then, their product has evolved a lot but they kept the same management teaIn 2010, they changed their name to “The Rock Trading”, with a division dedicated to managing funds and an exchange to trade currencies and stocks. In June 2011, the first Bitcoin was traded on The Rock Trading, making it one of the oldest exchanges still alive! As the website continued to grow, they started to add new currencies (such as Litecoin, Namecoin and others) and in May 2013 they became a Ripple gateway and an official XRP reseller.