A good idea is to keep like 5% of your bitcoin stash somewhere separate to the other 95%. That way if you are ever threatened with arrest, prison time or even a $5 wrench attack (adjusted to $9 wrench due to brrrrr induced money printing) you can give up the smaller stash and keep your big stash.
You have a good idea here, sir, but to be honest with you, in my country, you had better not even give up anything to the police or military force, like showing or giving up like 5%; they will just assume you still have quite a lot more holdings before you were able to give out five percent. So, if maybe the level of torture was just 10% before you gave up the five percent holding, they will increase the torture state to 50% just to forcefully get the information they want. There is this popular phrase in my country that says, "If the police torture you, you will confess both what you are guilty of and what you are not guilty of."
I know that some countries' police are friendly, though.
But based on what you said, I will likely go with your idea, share my asset into two, and hide 95% of it somewhere safe (that they can't access). The remaining 5%, I will not even give it up to them freely, but I will just keep a bit of a difficult trace for them, which they will still find out for themselves. So that when they do find out the 5 percent, they will themselves be convinced that that's just all I'm holding. If they doubt, let them keep searching and torturing me; they will never find the rest, and I will not say any sh*t to them.