These guys have plenty of money already and do this as a side gig or hobby, and I personally trust keeping my coins there more than I do on my own computers.
Have you seen their credentials? They're the reason Bittrex got popular.
https://bittrex.com/Home/AboutRichie is currently the manager of the Amazon Security Operations Center and is in charge of security response and operations for Amazon.
Rami is currently Director of Engineering at Qualys where he is the architect of their next generation vulnerability management solution and malware detection system.
Bill is currently the Manager of Security Threat Analysis and Security Engineering at BlackBerry.
I don't like that they host so many IPOs but they do what the community wants, which is "more more more new new new," unfortunately.