NXT is 100% Proof-of-Stake, no inflation currency/platform. It has been in production since late 2013.
Research papers and tools can be found here:
https://github.com/ConsensusResearchIf you haven't read about it, doesn't mean it doesn't exist.
Bitcoin should draw from the Proof-of-Stake coins experience and implement a hybrid PoW/PoS to be more secure and not depend on miners so much. The sufferings will continue if users don't have any power over consensus. Proof-of-Stake coins give power back to users.
nxt's market cap is $11million dollars. It is not proof of anything. If users had control of the fate of bitcoin they would run it into the ground just like the citizens of the US would destroy their own freedom if they had a pure democracy.