My understanding is that it's currently unproven, and certain ideas we used to have about it have already been disproven. I'd love to see an actual academic paper on what it would take to break the network.
There's also the fact that wealth inequality - specific groups of people owning significant amounts of money - will break the network's assumptions. This could be a good or bad thing, depending on your point of view.
Additionally, minting a proof-of-stake block locks your stake for 520 blocks. Most reasonable people would be angry that they can't access their money for that long. There's a workaround of reserving a certain amount of coins so that it can't be used for proof-of-stake, but that doesn't actually solve the problem, and generally means that the poor will reserve all their money and never generate a proof-of-stake block.
And that leads on to another issue with proof-of-stake; the rich get richer, as a rule that's explicitly built into the system. Probably not much richer, but it's against common ideology.
The other thing that most cryptocurrency enthusiasts won't like about Peercoin is that it's eternally mildly inflationary. While some will understand that this is essentially payment for security, others will argue that those who use the network more should pay more (via transaction fees), rather than a "tax".
I suspect that it will see a mild increase in use when they prove that they can get rid of centralised checkpointing, but I think there's a very significant core group that will not be able to get past the ideological issues and lack of academic research.
There's also the fact that wealth inequality - specific groups of people owning significant amounts of money - will break the network's assumptions. This could be a good or bad thing, depending on your point of view.
Additionally, minting a proof-of-stake block locks your stake for 520 blocks. Most reasonable people would be angry that they can't access their money for that long. There's a workaround of reserving a certain amount of coins so that it can't be used for proof-of-stake, but that doesn't actually solve the problem, and generally means that the poor will reserve all their money and never generate a proof-of-stake block.
And that leads on to another issue with proof-of-stake; the rich get richer, as a rule that's explicitly built into the system. Probably not much richer, but it's against common ideology.
The other thing that most cryptocurrency enthusiasts won't like about Peercoin is that it's eternally mildly inflationary. While some will understand that this is essentially payment for security, others will argue that those who use the network more should pay more (via transaction fees), rather than a "tax".
I suspect that it will see a mild increase in use when they prove that they can get rid of centralised checkpointing, but I think there's a very significant core group that will not be able to get past the ideological issues and lack of academic research.