You can't see me in my ninja outfit furiously rolling-up the Mona Lisa into a floatable titanium tube to be sealed in a salt-plugged chamber hidden on the side of my speedy, automated, self-sufficient, 150 M super-yacht. Nothing to see here. Move along. <-- The gist of what's happening but without the actual "Mona Lisa."

Yup. Effectively, printing their own currency of large denominations and trading in real money for them. Which then reduces to people stuffing real money into ever smaller suitcases for exfil and cleaning, regardless if they're new shiny thing dabblers, corporate pirates, actual pirates, or drug dealers.