I still have to trust the exchange when I want to trade since they want me to send them my funds first. I don't see the difference. I also have to trust Ledger or other wallet companies - hardware or software - that they did not put malicious code in their wallet. This thing about "I will not trust anyone" is a bit for wackos that believe in conspiracy theories I think. I trust my bank and doctors - we all do - if these folks are reputable I think it's fine. People trusted ICOs from all sort of shady folks LOL - that was something really stupid - didn't stop them investing and getting screwed though 

I think this thing is like a Ledger minus I don't have to find a hole to hide the wallet into. That cylinder looks pretty solid too to me, and data centers have a ton of security features. Ask any real stock exchange.

I got passed this by someone on the institutional side. It's a hosted hardware wallet.

https://vimeo.com/337814182

It looks like they have not launched yet. Anyone has more about them? I think it looks interesting.

CH