Stupid criminal is stupid
Another criminal gets caught for being stupid and not even taking the most simple money laundering precautions.
If you want to launder gold, start up a jewelry business making gold rings and chains, you buy an amount of gold legally and then you sell the rings and chains at a larger markup than usual due to the increased amount of gold you can include using the pilfered loot. Took me 2 mins to think of it. No doubt with some actual thought someone could think of one better.