In fact, if talking to more than one person, it seems to be almost a witch-hunt on how bad of a ponzi bitcoin is, and how 'it is backed by nothing', etc.
A person with no idea of how ponzi work other than how it is backed by nothing is illogical calling bitcoin as ponzi.
In fact almost every local currency in the world is backed by nothing other than trust to the government itself since tge gold standard was removed.
Bitcoin value with a simply supply and demand will explain everything.