A successful pyramid scheme has a couple of valuable attributes: "plausible deniability", i.e. the ability to disguise the pyramid scheme to convince as many pe

A successful pyramid scheme has a couple of valuable attributes: "plausible deniability", i.e. the ability to disguise the pyramid scheme to convince as many people as possible that it isn't actually a pyramid scheme, and "self-sustainability", i.e. the ability to keep the scheme going for as long as possible without collapsing. The article's headline suggests the article is about "plausible deniability". This has indeed been improving over time as the schemes have become more sophisticated. With Bitcoin for example, articipants could say "it's not a pyramid scheme because you can buy a pizza with it", although that was about the extent of it in practical terms (excluding more nebulous claims like "it is going to change the world", "it is the internet of money" etc.). However, with more sophisticated schemes like Ethereum, participants used to say things like "it's not a pyramid scheme because you can run DApps on it", now say things like "it's not a pyramid scheme because you can do DeFi with it", and may in future have something else with which to deny it is a pyramid scheme. However, the article itself talks specifically about NFTs. These aren't so much about "plausible deniability", but about "self-sustainability". People need to buy Ethereum to buy the NFTs. It is like the ICOs - people needed to buy Ethereum to participate in the ICOs. When the ICOs dried up and the ICO companies started cashing out their Ethereum the prices collapsed, but now we have NFTs to take their place. If NFT sales dry up and NFT sellers cash out the prices may collapse again, but by then there may be something else to take their place and keep the scheme self-sustaining.