you shouldnt expect anything higher than that except you want to give your funds for vanishing. usual banks cant even do closer to that. try with big funds and see what the return will be. and you know what, a year will be done like a flash because your mind wont be there at all.
What people need to understand is that anything over 100% could be maybe legit or a scam but in the end it will fail nevertheless. More than doubling each year is a high enough inflation that even crypto market can't cover, normally I would say it could be possible for things that are super hyped, but not every year and then the year it doesn't will make it go down and that will cause an exponential drop. That’s just what I think will happen.
So, if you are looking for staking, look at things with low rate, why? Because even though it gives you lower rate and lower return, it means that it could be sustainable and it could go on for many years that way.