Answer:

pyramidscheme

AnswerCrossword Clue
PYRAMIDSCHEMEMultilevel investment swindle
PYRAMIDSCHEMECertain scam
PYRAMIDSCHEMEPonzi's plan
PYRAMIDSCHEMEPlans for an ancient tomb?
PYRAMIDSCHEMEBusiness plan that's likely to collapse