Good point. My experience with moving to and from South America to the US is that it has been doable, but always with the feeling of "will the money get stuck somewhere this time" (and I never tried anything near this amount).

My concern in this specific situation was greater around moving money from crypto -> bank, vs. bank -> bank. My general sense is that once the money is inside of the traditional banking system, it's less likely to face issues.

But coming to the bank with a wad of cash (or crypto), in my view, could trigger all kinds of issues (in theory at least).