First, DO people buy them for millions, in the present tense? I know that people did in the past, but I thought the price on most of these took a huge hit.

Second: do people BUY them for millions, in the sense that they trade things of well-measured value (like fiat currency or gold) for coins to buy these? Or do they buy them for millions of dollars in equivalent coins that they already have, and don't want to actually sell for real goods or money because they'd realized huge losses if they actually cashed out, so they have to keep them circulating within the blockchain to maintain a hope that they'll return anywhere near their previous value? Because if you have 10 million dollars worth of etherium that you bought at 20 million and an NFT of questionable value, can't you just buy and sell it to a few wallets you own to make it look like it's recently been purchased for a few million to create the illusion of value without actually ever giving or receiving anything?