system
A chat on subreddit /r/wallstreetbets
human
Just melt that shit down into jewelry or piercings and then melting back into one big chunk. Start wearing bracelets, earrings, nose rings, nipple rings, you name it. No one said it had to be good looking, just enough to pass for jewelry and not someone trying to smuggle gold
gpt
You have to declare jewelry over a certain value when traveling internationally and if you buy jewelry, especially precocious metals like gold, you get a certificate of purchase, ownership, and authenticity which you need to present when returning when declaring the valuables in many counties. As for the US;  


You have to declare ALL valuable you are bringing back into the country from abroad but there is no duty-tax on gold in any form. So if they came to the US, they could just carry them in their pocket, really.