Legally yes. But as you know, within the planet's history humans have a track record of conquering other sovereign countries and just going in and taking what they want. Not legal but regularly done. So for example, consider the possible circumstance whereby the Vatican is taken over and the archives (hundreds of millions of secret, hidden records) are made public and we discover that their entire theology is a scam and they have secretly been worshiping Satan the entire time and raping and killing children as a ceremony and a business. I'm suggesting this as a possibility and not that this is true. But under that circumstance... any country under that type of circumstance, could be invaded and all their wealth and assets taken. But without invasion and a complete take over then legally no sovereign country or entity can have their weath confiscated.