Earlier quoted context omitted.
XKCD 538 remains ever relevant.
Not really. That one has been solved seen Bitcoin BIP 39 with plausible deniability. I mean: unless the attacker knows exactly how much coins you have, he has zero way to way if you're unlocking a decoy wallet or the real one.
That sounds so complicated, that even someone with a physics degree from MIT will not be able to make it work.