Physical possession of wealth is a bad long term strategy. Eventually people WILL find out, and you WILL become a target.
One of the main functions of government is private wealth protection. Banks are a feature, not a bug.
Transferring 500k between most developed countries should be easy enough, I'd probably talk to both banks first for such a large amount.
I don't need to ask anyone to move bitcoins.
If you think the government is protecting your wealth, you're incredibly naive.