Proof Of Stake har en del nackdelar kontra Proof Of Work, bland annat fler attackytor. Den stora förlusten att inte ha PoW, är att du förlorar kopplingen mellan den fysiska världen och den digitala världen, och utan den är det mycket mycket billigare och lättare att fuska. I PoW MÅSTE du utföra ett reellt fysiskt arbete för att påverka systemet. I PoS är det inte så.
Här är några förluster/stölder/ kopplade till PoS, listan är uppe i lite över 200 incidenter.
Utdrag från Rekt - Leaderboard
Men för mig är nog den stora nageln i ögat, att det är ett rent politiskt problem.
Besides this larger amount of complexity, trust, and attack surfaces, I would argue that a main issue with proof-of-stake is that it can be prone to centralization.
With a proof-of-stake system, the more coins you have, the more voting power you have, and those with the coins are also the ones earning the new coins from staking. Since they don’t need to expend resources to stake, they can simply increase their overall staking amount as they earn ongoing coins from staking rewards, and exponentially grow their influence on the network over time, forever. Network dominance tends to lead to more network dominance, in other words.
It would be like a political system where you get a vote for every hundred dollars you have, and then also get paid a dollar by the government for casting each vote. Mary the high school science teacher with $20,000 in net worth gets 200 votes, and earns $200 from the government for voting. Jeff Bezos, with $200 billion in net worth, gets 2 billion votes, and earns $2 billion from the government for voting. He’s a more valuable citizen than Mary, by a factor of a million, and also gets paid more by the government for already being wealthy.
utdrag ur Proof-of-Stake and Stablecoins: A Blockchain Centralization Dilemma - Lyn Alden
Ett citat från Adam Back som Lyn Alden också tar upp summerar det hela rätt bra:
You see that with other commodity money, like physical gold. It’s a system that works because money has a cost. I think money that doesn’t have a cost ultimately ends up being political in nature. So people closer to the money, the so-called Cantillon Effect, are going to be advantaged.
Proof Of Stake är FIAT all over again.