It is not false.
If someone has 5% now and they consistently keep their wallet open, they will likely end up with MORE than 5% of the total money supply because while they are staking there are a good amount of people that are not.
Thanxs for the answer.
So why kro55 wrote this:
You miss one detail: PoS will not staking. So it is ~0,9%. Why ~0.9% because you cannot find out how many block in PoW/PoS stage will be PoW and how many will be PoS.