You forgot another addition to the whitelist: any drug if you're a future Prime Minister or Chancellor of the Exchequer. Hard to believe the hypocrisy of Cameron and Osborne.
I don't make any such assumption. I'm sure some cryptocurrencies were made for that exact purpose. I think that the competition in the market for currencies will bring out the best result.
If monetary inflation was beneficial then a crypto-currency with those features would already exist. Only currency systems where there is no choice have come to the conclusion that inflation is good.