>Pyramid schemes now come in so many forms that they may be difficult to recognize immediately. However, they all share one overriding characteristic. They promise consumers or investors large profits based primarily on recruiting others to join their program, not based on profits from any real investment or real sale of goods to the public. Some schemes may purport to sell a product, but they often simply use the product to hide their pyramid structure. There are two tell-tale signs that a product is simply being used to disguise a pyramid scheme: inventory loading and a lack of retail sales. Inventory loading occurs when a company's incentive program forces recruits to buy more products than they could ever sell, often at inflated prices. If this occurs throughout the company's distribution system, the people at the top of the pyramid reap substantial profits, even though little or no product moves to market. The people at the bottom make excessive payments for inventory that simply accumulates in their basements. A lack of retail sales is also a red flag that a pyramid exists. Many pyramid schemes will claim that their product is selling like hot cakes. However, on closer examination, the sales occur only between people inside the pyramid structure or to new recruits joining the structure, not to consumers out in the general public.

It notes "lack of retail sales is also a red flag that a pyramid exist". What percentage of Bitcoin sales involve actual transactions of goods or services and not just a speculative investment? The price of Bitcoin has gone up some 2000% in the last two years when it simultaneously seems harder to spend when companies like Dell have stopped accepting it. It certainly seems like Bitcoin shows a lack of retail transactions.