I've no proof of this, but technically the whatsapp app is closed source so they could push an update that collects the private keys, if they don't do this already

More specifically, every thing he says is the dumbest thing i've ever heard, with no end in sight

I agree taxing fughazi is difficult. How about taxing the banks when they offer a loan for billionaires against their assets? Then they can pass that down as interest

Yes, however do you remember the big fuss over 5g tower tech coming from Huawei and how that is a security issue? Well turns out the 5g towers can employ beam forming for better connection with each phone. And the interesting thing is that AESA radars work much the same - so you can imagine what a nation wide network of these towers would provide for china in terms of air traffic information