Studies repeatedly demonstrated that investors in pyramid schemes realize their dubious nature and stand forewarned by the collapse of other contemporaneous scams. But they are swayed by recurrent promises that they could draw their money at will ("liquidity") and, in the meantime, receive alluring returns on it ("capital gains", "interest payments", "profits"). People know that they are likelier to lose all or part of their money as time passes. But they convince themselves that they can outwit the organizers of the pyramid, that their withdrawals of profits or interest payments prior to the inevitable collapse will more than amply compensate them for the loss of their money. Many believe that they will succeed to accurately time the extraction of their original investment based on - mostly useless and superstitious - "warning signs". While the speculative rash lasts, a host of pundits, analysts, and scholars aim to justify it. The "new economy" is exempt from "old rules and archaic modes of thinking". Productivity has surged and established a steeper, but sustainable, trend line. Information technology is as revolutionary as electricity. No, more than electricity. Stock valuations are reasonable. The Dow is on its way to 33,000. People want to believe these "objective, disinterested analyses" from "experts". Investments by households are only one of the engines of this first kind of asset bubbles. A lot of the money that pours into pyramid schemes and stock exchange booms is laundered, the fruits of illicit pursuits. The laundering of tax-evaded money or the proceeds of criminal activities, mainly drugs, is effected through regular banking channels. The money changes ownership a few times to obscure its trail and the identities of the true owners. Many offshore banks manage shady investment ploys. They maintain two sets of books. The "public" or "cooked" set is made available to the authorities - the tax administration, bank supervision, deposit insurance, law enforcement agencies, and securities and exchange commission. The true record is kept in the second, inaccessible, set of files. This second set of accounts reflects reality: who deposited how much, when and subject to which conditions - and who borrowed what, when and subject to what terms. These arrangements are so stealthy and convoluted that sometimes even the shareholders of the bank lose track of its activities and misapprehend its real situation. Unscrupulous management and staff sometimes take advantage of the situation. Embezzlement, abuse of authority, mysterious trades, misuse of funds are more widespread than acknowledged.