BTW Jet Cash case got me thinking about possible incidents with customs during border crossing. What if they turn their attention to to my Ledger wallet and require me to enter my PIN to check the fund I'm possessing. What the best reaction should be in this case? Would it better yet if I never take it with me on business trips abroad?
I don't think that's possible to do legally. They also don't check how much money you have in your online banking application, right?
What I mean is that they look for how much cash you carry. You can have as much as you want in bank.
And for Bitcoin, that has to be converted into a country's currency to count as funds.
However, let's say you are right and they care about your bitcoins. Do they know what a hardware wallet is? Highly unlikely. But let's say they know. You can enter wrong pin 3 times ("stress because of police") and you recover some other time from the seed. They cannot know if you have 1$ there or billions.