When I had more than $1000 HBD in savings in the past, I earned more than $20 HBD interest per month.
This was when the Hive Dollars (HBD) interest was 20% APR.
Nowadays it is 15% APR.
For example @seckorama fives days ago (on 2024.11.12) wrote that he have about $3000 HBD in savings, and he receive about $38 HBD interest per month.
Based on this, I think that nowadays around $24 000 HBD is needed to earn a monthly interest of around $300 HBD per month.
That would be a decent amount in passive income from the HBD savings.
Nowadays I am very far from that.
But maybe one day (in long term) I will reach it, considering the regular transfers to savings, and the compound interest.
Of course the interest rate can change anytime, as it is already changed in the recent past too from 20% APR to 15% APR.
So the amount you need in Hive Dollars (HBD) savings to earn a decent passive income from it can also change anytime.