This option which estimates staking days for each block, how good is it?
For example, it shows my 12k blocks require about a month to stake. At this rate, my annual stake is about 120% a year, not even close to what HYP should generate. I understand it s the difficulty issue but still, the difference s huge by now.
Do I need to increase the block size or add more blocks with more coins, what s the best strategy?
Treat this indicator as a warning that there is a chance that you will wait this amount of time. In fact you will see only a fraction of your blocks reaching or exceeding this age, some of them will stake much earlier, even right after 9 days. The best way to get an idea about staking efficiencies is to analyze block explorer data. For
example.
The effective average return rate is about 0.5% per day ATM, depending on your setup. I's about 180% APR without compounding, and 530% APR with compounding. Sure if you had entered at the stage of supply expansion, you would have been able to get more. But even this APR is huge enough, and you won't find it anywhere else without risks to be scammed or lose your investment due to hyperinflation.
Your block size is quite big, people across the network often use to make at least twice as small blocks as yours, but yes, the more blocks (with more coins), the more chances to stake (but the bigger the block is, the smaller return you will get).