How many possible staking inputs do these addresses have?
What is the min/max staking age of this coin?
How long a chain will they need to create to be longer?

Any such addresses need to have enough inputs to support not just a functional chain,
also with enough aged inputs to generate a long string of blocks with obscenely fast transaction time,
and also be "young" enough to ensure the chain necessary is not very long.


Not forgetting many PoS coins already have centralised checkpointing hard coded, and that active coins have regular checkpoints added to the source - so such centralisation is already a given.