I'm not an expert either. However, your opening was important and I've been into these questions a lot . There are different kind of situations to have safe havens:

• "normal everyday life"
• world of (economic) uncertainty (to which you were referring most?)
• pre-crisis situation (economic or else)
• full-blown panic (major stock crash? ; to which I was referring earlier)
• post-crisis environment

It strongly seems that Cryptos can work as safe havens at least for world of uncertainty. And yes, hopefully anything else won't be needed to test.

Upvoted.