I argue that falls into my point above. If there is a sentiment that by having a thing now, and by either holding it or selling it later, it will make you money

I argue that falls into my point above. If there is a sentiment that by having a thing now, and by either holding it or selling it later, it will make you money, there will be demand for the thing. Whether being able to sell it later for a profit is because of an intrinsic increase in its value or because the Fed propped it up is immaterial. You bought a thing, and later sold it for more money.