Definitely possible. And you guessed it - American.

Is health insurance the only thing to worry about? Any other reasons to save up a lot of money, or something to insure for?

For example, if a medical issue arises, insurance covers treatment, but if it's now difficult to sustain myself, am I now dependent on unemployment/social services (or savings)?

I lead a minimalist/nomadic lifestyle now, and always wondering if at some point the music has to stop and I have to integrate into the system as I get older (any kids, family aside).