The perpetuation of the high returns that a Ponzi scheme advertises (and pays) requires an ever-increasing flow of money from investors in order to keep the scheme going.

• 庞兹1903年从意大利移民到美国，1920年开始从事投资欺诈，短短半年间便从一个默默无名的穷商人，变成波士顿家喻户晓的百万富翁。