You've claimed that any investment in a fixed supply of something is a pyramid scheme. We mention Gold and Land (which also fit these criteria) and you hand wave about whether you're trying to use something as a currency or not.
Virtually all commodity investments have static supply in the short term. Bitcoin is a digital commodity. In fact it's the first digital commodity to be both counterfeit-proof and non-centralized, and those four properties (digital + commodity + counterfeit-proof + decentralized) drive 90% of it's value as a transaction and value store system. Can you name any alternatives which satisfy all four of those criteria?
What I ask from you is to disambiguate how it is that you view Bitcoin as a scam compared to any other fixed-supply commodity investment.