I guess that risk goes for every ATM, and not just for Bitcoin ATM. Costco is surely bullish about the future of Bitcoin in US, especially after the strong push by the president in all his pre-election speeches.

I hope we will see a greater amount of Bitcoin adoption in US. Costco is just doing their part to contribute to the ecosystem. Risk is always there but until and unless that risk is overpowering the benefits, there's no need to sleep over it.