plus 3 days time to converting or instant? I think it would not need both and 3 days would average out most time.

Or is there a reason i don't see? The best case would be we print a bazillion HBD and burn Hive with it. So defi platforms can use it as a stable coin.

Edit:
I ask because why should someone do it? If I can sell 1,05$ of Hive for 1,05USDT that's available on a lot of exchanges and easy to transfer. Why is HBD better in that case?