Well, the money supply increases rapidly, so I would suspect that present shares factor in the creation of future shares.
So suppose they sell for $1 per ProtoShare today... that would imply about a 750K market cap... we shall see what people are willing to pay for them
Uh.. you're using this as the distribution scheme? It's just going to get destroyed by botnets and server farms like YAC/etc did, and with the reward algorithm being the way it is it'll be hard to sell this distribution to people later.
This coin has a useful life of about 1 year... after which other coins will be derived from it. I suspect BitShares will be out in 6 months and that will have a linear decay over 12 years. Besides, this is a good trial run for the proof of work and I can also see how botnets handle it.