Malaysia have a special programme called MM2H which encourages wealthy expats to move there. You basically get an unlimited visa for you and dependants, amd can import anything duty-free. I was considering previously as a possible option without any thought of meltdown.

If I was to move there I would live in a gated compound with good security. I would get a safe and certainly keep as much gold as I could stored in it. You do make an important point though about the rule of law and property tights being upheld. This is one of the biggest advantages in the UK and one that many naive brits thing applies in other countries when it does not. It is actually specifically why I favour Malaysia over Thailand (where I have also lived and worked).

I went straight into international oil exploration after uni so it was easy for me to get out of the UK. For my kids (aged around 20) it's much harder for them to get decent jobs abroad. But I think if they can then they should leave the UK, at least for the next 10 years. If the slate does become wiped clean then eventually it might be worth returning.