You know what I don't understand, why does a block reward have to go down? Every economy in the world introduces new money into their system every day.  I can't remember the exact number but the U.S.A. introduces like 30 million into the economy every day.  I would think that a future coin should allow the block reward to increase not decrease.  As more people get interested the difficulty increases, as it increases so does the block reward.  People would be tempted to sell there coins when there were fewer of them (at higher prices) which stimulates an economy.  The goal is not to create a currency that people will hold onto, but to create a currency that people use and spread.  As the coin supply reaches a higher supply, and the price goes down, it will then be easier to use the coin to represent a dollar (or similar price).  

** If you take my idea at least let me in on the pre-mine lol.
***Dump then pump.