8% to 12% inflation is a rippoff - it'll still be a rippoff after the halving.
Not sure where you got 12% from. Inflation is high but it was intended to be high to ensure a wide distribution while providing an incentive to miners. To have lower inflation would require either a) a larger existing supply (more benefit to early adopters) or b) a lower subsidy (less security).
Money supply growth (forward annualized basis) is
Today: 9.61%
01/01/2016: ~8.67%
Immediately after halving: 4.17%
Immediately after next halving: 1.79%
Crypto could be used to store value theoretically but 5%+ inflation isn't particularly good properties for a store of value.
Well it should be there in 18 months or less.