Australians get easy access to the US through the E-3 visa.

For countries that need an H1-B, Canada's visas are much easier to obtain and live with.

There is always turmoil. Turmoil is not a new thing. What do you think it felt like moving here after the dot com bust or after 9/11 + George Bush or after the 2008 financial meltdown. Whats happening at macro levels are out of your control. Imho people who are driven and persistent succeed no matter where they go.

You can eschew turmoil, but that doesn't mean it will eschew you, as my EU co-workers are discovering in the UK.