Interesting thoughts and ideas. So first of all, thank you for sharing them.
I would say that the 25% conversion rate is too high. Even a single digit rate 5-10% would be enough in my opinion as you also have to take into account the time delay! 3 days to convert HBD to HIVE is probably the best defense against death spiral.
This is too much of a gamble for whales out there and therefore makes it hard to abuse.
The time-vault on savings is also a brilliant idea.
As you stated, the most important feature we need is a use case for HBD or a way to make the supply diminish in case this stablecoin gets out of hand (let's assume if it represents more than 1/3rd of HIVE MarketCap, this might be seen as systemic risk).
Thanks and take care, let's keep reflecting on the best path forward.
Posted Using LeoFinance Beta