No, apparently you don't know what a ponzi or pyramid scheme is or isn't.

A ponzi scheme is an investment where the investors are paid interest with their own money or money from other investors. Normally, this requires fraud on the part of the operator. He lies about what the investment is used for and where the interest comes from. The operator obscures the actual nature of the investment, for obvious reasons.

Pyramid scheme? Same thing with slight differences. The operator promises returns for enrolling others into the scheme. There is no real investment and no real products or services. Those involved get a cut of the new money, as does the operator. Those at the bottom don't actually receive anything.

Again pyramid schemes without the lie can exist, but again the investors are playing with fire.

Bitcoin is nothing like either of these. There is no fraud. There are no obscured details. The protocol is open source for all to see and the block chain is a public ledger of every Bitcoin transaction in existence! Bitcoins are what they are, and users are free to share their opinion. It's up to those people to do their due diligence and decide what the facts are and these facts are available for anyone to find! They may or may not purchase Bitcoin depending on whether or not they value it's properties. This is a key point as well, Bitcoins do exist, and they do have real world uses as well as certain properties that make them desirable for some people.

If I purchase Bitcoins, once I receive the coins, and the seller receives the cash, the exchange is done. There is no interest. There is no promise of return. There is no promise of profit. There is no operator. There is no scheme. There is risk! There is risk that everyone else may decide the properties of Bitcoin have no value. There is risk that a flaw in the protocol may change the properties. There is a risk that a protocol with improvements may replace Bitcoin.

Sharing an opinion, regardless of what it might mean for you personally, does not make you a ponzi scammer. If you are lying it might make you a creep. Saying, "Bitcoin is the currency of the future," is a rather harmless opinion and it's practically impossible to verify. I used to use fiat, now I prefer Bitcoin. That makes it the currency of my future! As far as the rest of the world, who knows?