You can sell them to yourself (at arm's length, using separate entities) to establish a price, and then sell them to yourself again (using a different entity) t

You can sell them to yourself (at arm's length, using separate entities) to establish a price, and then sell them to yourself again (using a different entity) to take the profit and launder the money. Crypto may be manipulated, but you can't just set an arbitrary price equal to the amount of money you need to launder.