I've been saving up my HBD as I noticed we now get 10% by keeping it in savings.
Given that the supply is rapidly expanding to push the price back to $1, you would be better off selling at $1.28 (price as of writing) and buying back later when it's $1 again than holding in savings now. It will take nearly 3 years to gain 28% sitting in savings.
sell HBD for what? another stable coin maybe? I look more at the exchange rate between HBD and Hive and when that is above a certain level I buy Hive, irrespective of their prices, because I believe in Hive long term and I want to get as much as I can
If you believe in Hive, it's Hive you should buy. That's the equity token that can make gains from increasing demand for HBD.
People buying HBD as a 'stable' token should sell now for fiat or something else stable and rebuy when it gets pulled back to peg price.
I am buying Hive with HBD but I only do that when I can get 3 or more Hive per HBD. The people that are buying HBD I think are doing it because it's profitable under the collateral conversion system that has been recent implemented
That is not the case. It's profitable to convert Hive to HBD right now, not the other way around.
The people buying HBD are speculators holding it on UpBit. That is seen empirically: almost all of the supply is being held on UpBit: