Good description.
Hive Dollar can be staked to collect interest. The interest rate is determined by consensus of the Hive Witnesses. That rate is currently 7% annually but is expected to increase after Hard Fork 25 (June 30th 2021). Staking is instant, unstaking takes 3 days.
Although I'm not a big fan of adding that extra layer of confusion. Our current system is amazingly simple:
Got HBD? Here is your interest!
Describing that savings account mechanism as staking is probably a good idea. Gives people a better understanding of what it is.