Why do you want spend you time explaining evident facts? Just show them a financial pyramid definition and stop casting pearls before swine.
Outwardly, bitcoin really looks like a classic financial pyramid and there is still nothing we can do about it. We all recognize that for that. for bitcoin to continue to rise in value, people need to invest more in it. The fact that it has been constantly increasing in price for more than ten years as a whole cannot serve as an absolute guarantee that this will continue in the future. Therefore, convincing someone that bitcoin is not a pyramid scheme is not worth it. This is a completely new type of financial asset, which is still difficult to explain to people who have dealt only with the common currency of states. For now, we should use Bitcoin and another potential cryptocurrency. Our profit over time will serve as a good proof of the cryptocurrency's performance, and the longer it lasts, the less someone will need to be convinced.