Currently, I'm a grad student in physics. I am originally from Germany, pursue my PhD in Canada and have not yet made any plans on where I would like to work and live afterwards. A career in academia would likely bring me to countries all over the world: I might return to work in Germany, stay in Canada, go to a research institute in the US or to some other European country.
Many countries have their own kind of retirement savings incentive, which make saving for your retirement tax free but require you to fulfill a set of conditions.
I wonder if these government-specific plans would be any good for me as it is quite likely that for some time to come I will live a nomad's live, with a postdoc here, a postdoc there, moving around quite a lot. I probably cannot expect to "finally" settle down until well into my 40s.
Should I rather invest entirely on my own, or is there a sensible strategy to leverage tax incentives or other benefits for "proper" retirement plans in multiple countries at the same time?