PoW
Has some centralization risks.
Waste a lot of electricity and Hardware.
Provides no incentive to spend or keep the coins.
PoS
Impossible to counterfeit a block.
Not only big player get rewards.
After the security aspect GhostNodes + Staking is much more fair.
i see POS being an advantage for all kinds of investors either small or big everyone will be able to get a share of rewards.