Quite, I've yet to see any evidence that Xapo's insurers are insuring against loss of customer BTC through theft or incompetence on behalf of Xapo.
Is there some reason you don't consider the statements they make on their website to be evidence? From
https://xapo.com/#aboutVaultYes, I would need for Meridian Insurance to put out a statement that they are insuring Xapo against loss of bitcoins under those circumstances. I'd also want to know more about Meridian Insurance.
Unfortunately people lie, so we will never be able to have 100% trust. But that would go some small way.
Good idea...
A secure vault insured by a heavy-duty insurance company would be awesome! Not sure how heavy-duty Meridian is, but sounds like we're on the right track with this kind of offerings.