I come up with this idea and I'd like to discuss it with everyone.
PPCoin uses coin age for network security, which is interesting, and I think coin age (or average coin age) should also be used for minting control.
Reasons listed below:
1 Using coin age, the total amount of minting is more predictable than using hashrate
2 Coin age/average coin age is more related to economic activities, so the minting rate can also be designed to meet economic requirement
3 Nobody will think "if I save PPCoin in my wallet, will it's value drop to 0 because of nobody mining it (which is the future picture of energy-efficiency) making the minting too fast".
If the interval of proof-of-work block is adjusted exponentially(so that it only provide an early-stage protection), and proof-of-stake uses the above minting strategy(it will finally replace proof-of-work in the role of minting), I think that will be better.
I apologize for my English. Hope everyone can understand my intention.
PPCoin is a fantastic alternate coin, I hope we can make it better.
I love PPCoin too, but your English is quite difficult to follow. Can you add some mathematical language to minimize miscommunication?
OK, I'll edit the post and try my best to make it clear. Sorry for the language problem.