[AnthonyMouse]

> They ask "how did you get that?" You answer "Oh I just sold this super expensive thing on a marketplace". Then they ask "Ok, but how did you get/buy this expensive thing?" What do you say?

This is not the part cryptocurrency replaces. If you suddenly have a million dollars and you say it's because you sold some Bitcoin, they're just going to ask where you got a million dollars worth of Bitcoin.

Moreover, the answer in practice is that they make something up. Pretend they're playing Storage Wars and finding treasures when they're actually buying worthless storage lockers with a tiny amount of clean money and expensive items with dirty money, or sell things they could plausibly claim to have made themselves or restored/repaired themselves. There are tons of real companies whose business is to haul away some other company's junk and then try to sell it, but then who can say whether or not all the TVs they're selling were among the pallets of junk they were paid to haul away from a dozen different corporate offices?