Although disconcerting, I don't see how this even holds weight. In order to confiscate a digital asset they would need your private keys. If you don't travel with your cold wallet, how can they take your digital cash? Technically if your phone or computer is turn off when you cross the border you don't have access to your crypto. I need more details before I start to worry.
They can take my computer and/or phone but if its off they can't access since I won't give up my password. Your hard drives should always be encrypted in case they make a copy.