thanks! i hope i understood you correctly:
Also i read point 7.3 Madurity on
http://tauchain.org/tauchain.pdf "And Tau-Chain will not implement coins from day 1, but it is something that can and should be
built upon the system"
one of tau's magic is that it doesn't need a currency in order to have incentive to participate (see what HMC answered to CoinTelegraph
http://cointelegraph.com/news/tau-chain-a-decentralized-app-store-with-greater-flexibility-than-ethereum). what i mentioned on tauchain.pdf that tau may contain coins in the future, has to be understood in either:
1. applications over tau can implement coins, just like agoras.
2. it is technically possible that tau's root chain will have some kind of coins. but it might not be the best choice. you probably remember the blogpost "decentralized democracy and the role of the first users". if the users will decide to have a currency on root, i can't help that. but it might not be a good idea since we really want to keep the root chain as minimalistic as possible, offering a platform to build applications over it.
so we don't present any investment model in tau, as we don't even have anything to sell. if the first users will see things differently - then that's what will happen. similarly, the "rules of changing the rules" (to be set by the first users as well) may leave such future option.
therefore no one including me has no way to profit from tau directly, unless, it'll be decided by the users while all users begin with same power.
i hope i covered all your points. let me know otherwise