All I know is that when BTC crashed from $20k to sub-$4k, and BCH from $4.3k to $75 (which was insane, December 2017 to December 2018), none of the offshores went out of business.
I assume they keep some exposure to crypto, but I suppose if you're already printing money then the sensible thing to do (from the books' perspective) is to stay 95-100% in USD.