https://thenextweb.com/cryptocurrency/2018/06/29/this-company-wants-to-stop-hackers-from-stealing-your-cryptocurrency/

How much stolen cryptocurrency is in circulation? A lot. Just last month, hackers breached Bithumb and Coinrail, two South Korea–based cryptocurrency exchanges, and stole over $70 million worth of various crypto tokens.

Bithumb and Coinrail are not alone in their ordeal. Since the founding of the first cryptocurrency exchange in 2010, hackers have walked away with billions of dollars’ worth of cryptocurrencies and digital tokens stolen from exchanges, and they continue to eye the cryptocurrency landscape as an attractive arena to make money. In 2014, a huge $460 million breach at Mt Gox caused the collapse of the then-largest bitcoin exchange and a sudden drop of the price of cryptocurrencies.