Any coin with a ROI above ~20% / year will be unsustainable due to the crazy inflation. Believe me, I've experienced some of the old ones and they all went south after a while.
Choose a PoS coin with reasonable, realistic figures.
This isn't true. There are many that are extremely successful above 20% a year. Many high priced hyped coins with "reasonable" rates have fallen in fallen. The high volatility of low price higher staking (20 to 200%) coins with good wins out.
You know that if a coin goes from 3 to 4 sat you've made 25% return?
I wasn't talking about price fluctuations. I was referring to the PoS coins that by design offer very high returns only from staking.
If everybody generates 400% / year what do you think will happen? Crazy inflation, everyone dumps, price plummets, coins dies....
I have to agree, 400% should be stated not as a benefit but as a cost. This is the tax by the network on the holders for operation and transaction confirmation. Just because the money goes back to holders initially, overall the network is running at a super high cost.
Try to compare it to Bitcoin mining fees, who is glad when they rise. Nobody because we have to pay it to someone else, here the cost to stake is the same kind of cost to the network continuation even if you are also receiving the mining fee equivalent that Bitcoin gives only to those with hardware.
So in short, its not sustainable. If you make your POS holding more diverse then consider networks which I know have been low cost staking ince 2014, a couple of those would be BLK and ENRG
I hold both of those and they have active developers, the stake return is only like 5% but that is not bad and even this is an elevated amount not true cost because exchanges do not take part in POS boosting returns for all others. Let me know if you need further details or a link to those ANN threads but they are 4 years strong now