That's also why suitcases full of cash are considered suspicious and you can't bring with you as much as you want across borders[0][1]. The problem is acknowled

That's also why suitcases full of cash are considered suspicious and you can't bring with you as much as you want across borders[0][1]. The problem is acknowledged (though not solved) when dealing with cash, so that's not a valid argument for ignoring it in Bitcoin. 0: http://ec.europa.eu/taxation_customs/customs/customs_controls/cash_controls/index_en.htm http://ec.europa.eu/taxation_customs/customs/customs_control... 1: https://help.cbp.gov/app/answers/detail/a_id/778/~/declaring-currency-when-entering-the-u.s.-in-transit-to-a-foreign-destination https://help.cbp.gov/app/answers/detail/a_id/778/~/declaring...