if bitcoin had no purpose//function. and was just a buy to sell investment where there was no side value apart from speculation then it would be a ponzi

but as long as people can use bitcoin.. yes USE BITCOIN as a independant currency to buy pizza, baked beans and beer then it has a function and purpose

just being a store of asset with no other function than to just sell it. is a ponzi
its why i hate the idea of stiffling bitcoin out of a functional currency utility and hate to deem it as just a store of value
because using other networks as a currency/payment system makes bitcoin itself functionally nothing. where by the only thing holding it up is the acquisition cost vs speculative sells