No PoS system has emerged that can both remain perfectly distributed while also preventing double spend chain forks. If the cost to participate in multiple conf

No PoS system has emerged that can both remain perfectly distributed while also preventing double spend chain forks. If the cost to participate in multiple conflicting histories is effectively 0 (as it isn't with PoW, but is with PoS) then you can prioritize a history most beneficial to you instead of the reality. Honestly, if you are going "big leagues" in cryptocurrency, I don't think having a central authority is bad as long as procedures are in place to contest flawed histories. Peercoin does its PoS through the developers signing key locking history - as long as people trust the devs, they trust the blockchain. If someone can prove the Peercoin blockchain is manipulated, the chain and project can be forked and someone else can be given confidence by whatever measure the community wants to use.