You can argue semantics (I mean you're not really even trying) but the fact is that most pyramid schemes at least give some bottles of herbal supplements or crystals or something. Crypto is valued exactly as much as the rate that people keep buying it (minus a load of wasted electricity) and nothing else.

It is literally illegal in the US to advertise investments on TV yet there has been an absolute bombardment of marketing trying to get as many average joes as possible to buy crypto to goose the price. Enticing unsophisticated investors with a promise of massive rewards coupled with badgering FOMO is the exact MO of pyramid schemes.