Bizarre claim: Johann Rupert said the thought of the poor rising up and overthrowing the rich keeps him awake at night +4 Bizarre claim: Johann Rupert said the thought of the poor rising up and overthrowing the rich keeps him awake at night The multi-billionaire owner of luxury jewellery Cartier has said that the thought of the poor rising up and overthrowing the rich keeps him awake at night. Speaking at a summit in Monaco, Johann Rupert said he fears that a poor uprising will mean the middle classes won't want to buy luxury goods in the future for fear of exposing their wealth