https://www.investopedia.com/terms/g/greaterfooltheory.asp https://www.investopedia.com/terms/g/greaterfooltheory.asp What Is the Greater Fool Theory? The gre

https://www.investopedia.com/terms/g/greaterfooltheory.asp https://www.investopedia.com/terms/g/greaterfooltheory.asp What Is the Greater Fool Theory? The greater fool theory argues that prices go up because people are able to sell overpriced securities to a "greater fool," whether or not they are overvalued. That is, of course, until there are no greater fools left.