People compare bitcoin to a Ponzi scheme because the price increases when more money flows into the underlying asset. If I buy for X and sell for X+100 that 100 profit of mine came from another person who bought into the scheme after me. In the eyes of many, this is dangerously close to how Ponzi schemes generate value.
What you’re saying here by no means shares any sort direct coordination with Ponzi schemes. What you described here is exactly how the financial markets work and many financial products. This is just basic buy/sell demand which sets pricing.
If bitcoin were a ponzi then Satoshi would have taken off with money long ago. Bitcoin is also established by being open sourced, and designed so that there is no central figure that has any way of stealing or manipulating funds/coins.