I'd support this with a lower exchange rate, essentially a backup, maybe 0.98 or so. This would also have the advantage of avoiding depleting the BTC backstop quickly. Right at 1:1, a lot of BTC might get redeemed. At 0.98 , it won't unless there is real stress on HIVE/HBD.

In the event that the BTC does get redeemed, this accrues a small profit to DHF, which always values and can exchange between HIVE/HBD at 1.00