The number is probably nonzero but those are the whales, the kids of the super rich who have millions to blow on trivial shit. The rest will be in it for trading, for the potential that either another trader will buy their stuff for more (in the hopes that it will appreciate more) or one of those whales will.

But it's probably mostly money laundering, I wouldn't be surprised if the crypto market is tightly integrated in it too. Buy using crypto, sell using fiat, ???, cash.