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The type of organised crime you are talking about will do better making profits elsewhere. Someone can hold a gun to your daughter's head and make you go to the bank and get cash out... they don't need to ask for your bitcoin keys!
and
professional-James-Bond-ninja-operative breed of criminals
..... well, that's where your perspective becomes a bit laughable... You watch too many movies clearly
There is an important difference in the execution of these crimes though. 1) If an attacker had to send to you to the bank for the money while holding a family member, there would be a high probability of the situation turning into a very public hostage case. Not ideal for an attacker. 2) You obviously can't go to the bank and withdraw 60 million dollars. You would be forced to wire it to the attacker, which would require all kinds of authorizations. Very trackable. It would take a huge amount of setup to get away with it. Again, not ideal for an attacker.
A passcode, however well protected, that
transfers 60 million dollars of untraceable digital cash without a need to leave the victim's house to carry out the transaction presents an ideal scenario for an attacker. Like really, it doesn't get much better than that.
I used humorous language to make a serious point. Millions of dollars cash held by an individual is enough to attract the likes of professional criminals and trained operatives. Pick your mafia, cartel, mob, agency, military or government. Doesn't matter where they come from, but they are out there.
OP, I think what you're saying is possible. But at this point, simply not probable
Everything about Bitcoin, from its orgins to its markets, have been "not probable". I expect its future to be even more so.
But no need to be scared of intelligent hackers. They already have bitcoins, and even a thief gets lazy after receiving million$ in an honest way.
I think a wave of digital cash hitting the internet will only spawn more hackers. Surely not all of them have Bitcoins, and will not get paid off during a mass adoption transition. More and more will come out the woodworks. Which I understand, because to be honest, the whole idea sounds like a lot of fun. The whole white hat/black hat struggle would get very real again.