It is yet to be proven if it is "as secure" because no PoS network has operated at scale.
It also certainly defeats much of the original purpose of decentralization when a few stakeholders have total control of the network because they hold the most coins...
Regardless if the network has "correct incentives" or not, things can happen to those stakeholders outside their control, or other incentives could easily develop to act in bad faith against the network.
It also certainly defeats much of the original purpose of decentralization when a few stakeholders have total control of the network because they hold the most coins...
Regardless if the network has "correct incentives" or not, things can happen to those stakeholders outside their control, or other incentives could easily develop to act in bad faith against the network.