Let's get something straight here, Bitcoin is not a pyramid scheme, and nothing in its mode of operation suggests or encourages such. A pyramid scheme is a referral-sustenance scheme that often collapses over time, and a typical example is a Ponzi scheme. In the end, there are always victims and it relies on new subscribers for it to thrive.

Bitcoin is certainly nothing like that, no one is compelling anyone to bring another person/subscriber for the sake of benefit(s).