For instance, if the third party refuses to authorize a legitimate transaction, you have a third key you keep offline somewhere that can be used to force a transaction through.
The answer is to live anonymously. Don’t flash the cash.
But still, the original argument was that you have to worry about chain analysis because everything is public, but obviously that isn't true, no matter if an exchange may or maybe not inadvertently leak something.
Or, they have wallets that acts as combined input/output for all/groups of users.
I don't know a single big exchange that generates exactly one wallet per user and uses that one always for the same user.
When you think about it, it makes a lot of sense they do it like that.
A friend of mine became insanely wealthy just off of Bitcoin. Immediately went off the grid a few years (back in 2017). Now owns a precious metals mining company in South America. Still holds Bitcoin, lives comfortably to a point, changed passports to evade sanctions (he was Russian), and even has a kind of his own private army, that's mostly involved in the mining business.
You wouldn't figure all of that out by simply looking at him, but strike him now and you'd have to contend against a few major governments at this point.
But yeah, he basically lives like a dead man.
Use 2 or 3 safety deposit boxes, they are very cheap.
Coercion is a thing, and despite what you see in the movies, you'd be surprised at how fast you offer the password.
But perhaps more certainly, you will at some point die, and it's probable you will do so lacking the capacity to pass the code on to your heirs. So if you want your wife and family to jnherit, well, you may want to rethink.
And that's before we discuss thd uselessness of crypto as currency where you have to go to your safe deposit box to spend any of it.
You can also put your password in your will, if you're afraid of not passing it to your family.
Of course this assumes you have a spouse
Now the intruder has a gun pointed at both of you.
Reputable private security?
It doesn't seem to be uncommon for wealthy people to need private security. It seems like some of the crypto-types are learning why the hard way.
Is that going to cramp their style? Well sure, that's part of the consequences of their choices.
For example, sure, don't store your funds on an exchange and they can't get in with a SIM swap, but when they're in your house, that doesn't help you.
You could store your funds with a multisig wallet and make sure you don't have access to enough keys at home to move the funds, but how do you make them believe you?
You can have one or more decoy wallets you can "cave" and give them access to if you think it might buy your freedom, but once you start, again, why would they believe you?
Do you just acknowledge that they won't believe you,that they are going torture you regardless? And at least make sure you or your heirs have the money if any of you survive?
There really isn't a good way out of this.