A reader writes: What do investors mean by “intrinsic value”? Archer replies: So an NFT (non-fungible token) of Twitter (now X) founder’s Jack Dorsey’s first tweet once sold for $2.9 million. The tweet was posted on March 21, 2006; it was purchased on March 5, 2021, by Iranian investor Sina Estavi. In a real world test of the greater fool theory, the new owner soon put it back on the market, asking $48 million. That didn’t quite pan out; more recently, it went for less than $4.