I don't think there is a great answer. Crypto crash = HIVE down, BTC down, ETH down. DAI will have trouble in that situation because a lot of its backing is ETH. There will be many liquidations and it will struggle to hold its peg too. Some of it's backing is centralized stablecoins, another vulnerability. Centralized stablecoins themselves, we all know the issues. Pax gold is similar.
Another issue is coordination of the holding and selling process. Probably it would be multisig and coordinating BTC multisig and getting signers in the event it is needed is hard enough. Splitting across multiple coins means even more complications.
When I work through it, I end up coming to the same conclusions as others which is to stick with BTC. You get some benefit from non-perfect correlation with HIVE, and it is still manageable.