Where does “pyramidihuijaus” come from?

pyramidihuijaus (Finnish) comes from Finnish pyramidi, from French pyramide, from Old French piramide, from Latin pȳramis, from Ancient Greek πυραμίς, from Ancient Greek -ῐς — a woman pertaining to —; "suffix forming feminine...

pyramidihuijaus (Finnish): pyramid scheme, Ponzi scam illicit money-making investment scheme whereby early investors are paid primarily or wholly by later investors