The prediction of the OP was still very good so far that the model would make bitcoin fail as a currency because of the high investibility that would encourage people to hoard it and benefit from it as a pseudo pyramid scheme than using it as a currency.
....
As a viable currency or even a store of value it should behave roughly as a commodity but clearly its not and probably never will.
1. seems you are still unsure of what a pyramid scheme is..
a pyramid scheme is where when something is sold at the end customer. there is a trail of people above that all get a % of that customers funds.
in bitcoin one person has it. one person buys it. its an asset swap not a pyramid,
if i sold my coin today, the person i got my coin from years ago does not get a % of the funds of my sell to a new person
bitcoin is not a pyramid
2. seems you are still unsure of what commodities are..
a commodity is a raw material used to create other products.
and asset is different. an asset holds value by-and-for its own unique features as-is. not its future different product.
bitcoin is bitcoin. its nothing else and does not become anything else. so its an asset. valued on its own merits/features/cost of acquisition