The eugenist “laid the foundations of his fortune in a very curious and poetical way, the nature of which I have never fully understood. It consisted in his walking about the street without a hat and going up to another man and saying, “Suppose I have two hundred whales out of the North Sea.” To which the other man replied, “And let us imagine that I am in possession of two thousand elephants’ tusks.” They then exchange, and the first man goes up to a third man and says, “Supposing me to have lately come into the possession of two thousand elephants’ tusks, would you, etc.?” If you play this game well, you become very rich; if you play it badly you have to kill yourself or try your luck at the Bar.” — Eugenics and Other Evils, by G.K. Chesterton

It works great as long as you never need to actually deliver the whales.