If your goal is to avoid seasickness, I recommend staying on dry land.
Inhabitable dry land is all taken over already, you know...
as soon as Nauru decides to emulate you, your competitive advantage is gone.
But that's the whole point! Seasteaders don't want to live in the sea for the sake of it. Of course that if this is the only parameter, no doubt that I prefer to live on dry land like our species was meant to be.
The idea, though, is to bring competition to governments, and eventually "persuade" them to improve themselves - and consequently the life standards of all would improve as well.
You seem to be quite a problem-oriented person. Instead of focusing on potential solutions, you immediately see the difficulties and dismiss the entire thing. Many people regret having treated Bitcoin this way in the past.
Anyways, thanks for taking your time to address my questions.