In PoS the rich gets richer and it incentivizes people to hold a lot of coins because then they earn more that way causing some centralization. I don't think coins should be held, they should be used.
And when you realize that in crypto pretty much every coin can easily jump 10-20% up or down in value within just a single day, holding coins just for a couple of percentages a year I think is crazy.
Maybe if a coin that would be successfully pegged to something might be worth it to safely stake.
The Fact they consider the Coin has Value is one reason to hold it.
No different than LTC miners not selling every single litecoin, waiting for a better price.
Here is the difference,
when the Proof of Stake guy sells his stake, he decreases his future ability to make more coins, so he will not keep getting richer, in fact if he keeps all of his coins forever and never sells, he raised the price for everyone else but never got anything in return.
Most of the time , Fast Cars & even Faster Women, will get the guy to give up PoS mining
(Harvest) capacity.
But the LTC miner can give up every single coin and it does not affect his ASICs ability to make more.
If the LTC Price stayed the same, the PoW miner would be richer, but PoW or PoS both are controlled by the economic laws of supply and demand.
So massive supply decreases demand and lowers the price until demand catches back up.
But we also know PoW ASICS output decrease every 2 weeks, but the ASICS upgrade costs and electricity costs , will always make PoW a losing proposition within a year.